479 results on '"Murray, Krahn"'
Search Results
2. Sex differences in direct healthcare costs following stroke: a population-based cohort study
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Amy Y. X. Yu, Murray Krahn, Peter C. Austin, Mohammed Rashid, Jiming Fang, Joan Porter, Manav V. Vyas, Susan E. Bronskill, Eric E. Smith, Richard H. Swartz, and Moira K. Kapral
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Stroke ,Sex ,Healthcare cost ,Health services research ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background The economic burden of stroke on the healthcare system has been previously described, but sex differences in healthcare costs have not been well characterized. We described the direct person-level healthcare cost in men and women as well as the various health settings in which costs were incurred following stroke. Methods In this population-based cohort study of patients admitted to hospital with stroke between 2008 and 2017 in Ontario, Canada, we used linked administrative data to calculate direct person-level costs in Canadian dollars in the one-year following stroke. We used a generalized linear model with a gamma distribution and a log link function to compare costs in women and men with and without adjustment for baseline clinical differences. We also assessed for an interaction between age and sex using restricted cubic splines to model the association of age with costs. Results We identified 101,252 patients (49% were women, median age [Q1-Q3] was 76 years [65–84]). Unadjusted costs following stroke were higher in women compared to men (mean ± standard deviation cost was $54,012 ± 54,766 for women versus $52,829 ± 59,955 for men, and median cost was $36,703 [$16,496–$72,227] for women versus $32,903 [$15,485–$66,007] for men). However, after adjustment, women had 3% lower costs compared to men (relative cost ratio and 95% confidence interval 0.97 [0.96,0.98]). The lower cost in women compared to men was most prominent among people aged over 85 years (p for interaction = 0.03). Women incurred lower costs than men in outpatient care and rehabilitation, but higher costs in complex continuing care, long-term care, and home care. Conclusions Patterns of resource utilization and direct medical costs were different between men and women after stroke. Our findings inform public payers of the drivers of costs following stroke and suggest the need for sex-based cost-effectiveness evaluation of stroke interventions with consideration of costs in all care settings.
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- 2021
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3. Implementation, spread and impact of the Patient Oriented Discharge Summary (PODS) across Ontario hospitals: a mixed methods evaluation
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Shoshana Hahn-Goldberg, Tai Huynh, Audrey Chaput, Murray Krahn, Valeria Rac, George Tomlinson, John Matelski, Howard Abrams, Chaim Bell, Craig Madho, Christine Ferguson, Ann Turcotte, Connie Free, Sheila Hogan, Bonnie Nicholas, Betty Oldershaw, and Karen Okrainec
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Implementation ,Discharge ,Patient Centred ,Transitions in care ,Local adaptability ,Triangulation ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Traditional discharge processes lack a patient-centred focus. This project studied the implementation and effectiveness of an individualized discharge tool across Ontario hospitals. The Patient Oriented Discharge Summary (PODS) is an individualized discharge tool with guidelines that was co-designed with patients and families to enable a patient-centred process. Methods Twenty one acute-care and rehabilitation hospitals in Ontario, Canada engaged in a community of practice and worked over a period of 18 months to implement PODS. An effectiveness-implementation hybrid design using a triangulation approach was used with hospital-collected data, patient and provider surveys, and interviews of project teams. Key outcomes included: penetration and fidelity of the intervention, change in patient-centred processes, patient and provider satisfaction and experience, and healthcare utilization. Statistical methods included linear mixed effects models and generalized estimating equations. Results Of 65,221 discharges across hospitals, 41,884 patients (64%) received a PODS. There was variation in reach and implementation pattern between sites, though none of the between site covariates was significantly associated with implementation success. Both high participation in the community of practice and high fidelity were associated with higher penetration. PODS improved family involvement during discharge teaching (7% increase, p = 0.026), use of teach-back (11% increase, p
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- 2021
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4. Cost-effectiveness of an indicated preventive intervention for depression in adolescents: a model to support decision making
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Ssegonja, Richard, Sampaio, Filipa, Alaie, Iman, Philipson, Anna, Hagberg, Lars, Murray, Krahn, Sarkadi, Anna, Langenskiöld, Sophie, Jonsson, Ulf, and Feldman, Inna
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- 2020
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5. Raising the bar for patient experience during care transitions in Canada: A repeated cross-sectional survey evaluating a patient-oriented discharge summary at Ontario hospitals.
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Karen Okrainec, Audrey Chaput, Valeria E Rac, George Tomlinson, John Matelski, Mark Robson, Amy Troup, Murray Krahn, and Shoshana Hahn-Goldberg
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Medicine ,Science - Abstract
BackgroundPatient experience when transitioning home from hospital is an important quality metric linked to improved patient outcomes. We evaluated the impact of a hospital-based care transition intervention, patient-oriented discharge summary (PODS), on patient experience across Ontario acute care hospitals.MethodsWe used a repeated cross-sectional study design to compare yearly positive (top-box) responses to four questions centered on discharge communication from the Canadian Patient Experience Survey (2016-2020) among three hospital cohorts with various levels of PODS implementation. Generalized Estimating Equations using a binomial likelihood accounting for site level clustering was used to assess continuous linear time trends among cohorts and cohort differences during the post-implementation period. This research had oversight from a public advisory group of patient and caregiver partners from across the province.Results512,288 individual responses were included. Compared to non-implementation hospitals, hospitals with full implementation (>50% discharges) reported higher odds for having discussed the help needed when leaving hospital (OR = 1.18, 95% CI = 1.02-1.37) and having received information in writing about what symptoms to look out for (OR = 1.44, 95% = 1.17-1.78) post-implementation. The linear time trend was also significant when comparing hospitals with full versus no implementation for having received information in writing about what symptoms to look out for (OR = 1.05, 95% CI = 1.01-1.09).InterpretationPODS implementation was associated with higher odds of positive patient experience, particularly for questions focused on discharge planning. Further efforts should center on discharge management, specifically: understanding of medications and what to do if worried once home.
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- 2022
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6. Comparative effectiveness of the different components of care provided in heart failure clinics—protocol for a systematic review and network meta-analysis
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Morgan Slater, Joanna Bielecki, Ana Carolina Alba, Lusine Abrahamyan, George Tomlinson, Susanna Mak, Jane MacIver, Shelley Zieroth, Douglas Lee, William Wong, Murray Krahn, Heather Ross, and Valeria E. Rac
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Heart failure ,Systematic review ,Network meta-analysis ,Comparative effectiveness ,Medicine - Abstract
Abstract Background Heart failure (HF) is a complex chronic condition, leading to frequent hospitalization, decreased quality of life, and increased mortality. Current guidelines recommend that multidisciplinary care be provided in specialized HF clinics. A number of studies have demonstrated the effectiveness of these clinics; however, there is a wide range in the services provided across different clinics. This network meta-analysis will aim to identify the aspects of HF clinic care that are associated with the best outcomes: a reduction in mortality, hospitalization, and visits to emergency department (ED) and improvements to quality of life. Methods Relevant electronic databases will be systematically searched to identify eligible studies. Controlled trials and observational cohort studies of adult (≥ 18 years of age) patients will be eligible for inclusion if they evaluate at least one component of guideline-based HF clinic care and report all-cause or HF-related mortality, hospitalizations, or ED visits or health-related quality of life assessed after a minimum follow-up of 30 days. Both controlled trials and observational studies will be included to allow us to compare the efficacy of the interventions in an ideal context versus their effectiveness in the real world. Two reviewers will independently perform both title and abstract full-text screenings and data abstraction. Study quality will be assessed through a modified Cochrane risk of bias tool for randomized controlled trials (RCTs) or the ROBINS-I tool for observational studies. The strength of evidence will be assessed using a modified Grades of Recommendation, Assessment, Development, and Evaluation (GRADE) system. Network meta-analysis methods will be applied to synthesize the evidence across included studies. To contrast findings between study designs, data from RCTs will be analyzed separately from non-randomized controlled trials and cohort studies. We will estimate both the probability that a particular component of care is the most effective and treatment effects for specified combinations of care. Discussion To our knowledge, this will be the first study to evaluate the comparative effectiveness of the different components of care offered in HF clinics. The findings from this systematic review will provide valuable insight about which components of HF clinic care are associated with improved outcomes, potentially informing clinical guidelines as well as the design of future care interventions in dedicated HF clinics. Systematic review registration PROSPERO CRD42017058003
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- 2019
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7. Characterizing the cascade of care for hepatitis C virus infection among Status First Nations peoples in Ontario: a retrospective cohort study
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Andrew B. Mendlowitz, Karen E. Bremner, Murray Krahn, Jennifer D. Walker, William W.L. Wong, Beate Sander, Lyndia Jones, Wanrudee Isaranuwatchai, and Jordan J. Feld
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General Medicine - Published
- 2023
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8. Excess cost of care associated with sepsis in cancer patients: Results from a population-based case-control matched cohort
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Michelle Tew, Kim Dalziel, Karin Thursky, Murray Krahn, Lusine Abrahamyan, Andrew M. Morris, and Philip Clarke
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Medicine ,Science - Abstract
Background Cancer patients are at significant risk of developing sepsis due to underlying malignancy and necessary treatments. Little is known about the economic burden of sepsis in this high-risk population. We estimate the short- and long-term healthcare costs of care of cancer patients with and without sepsis using individual-level linked-administrative data. Methods We conducted a population-based matched cohort study of cancer patients aged ≥18, diagnosed between 2010 and 2017. Cases were identified if diagnosed with sepsis during the study period, and were matched 1:1 by age, sex, cancer type and other variables to controls without sepsis. Mean costs (2018 Canadian dollars) for patients with and without sepsis up to 5 years were estimated adjusted using survival probabilities at partitioned intervals. We estimated excess cost associated with sepsis presented as a cost difference between the two cohorts. Haematological and solid cancers were analysed separately. Results 77,483 cancer patients with sepsis were identified and matched. 64.3% of the cohort were aged ≥65, 46.3% female and 17.8% with haematological malignancies. Among solid tumour patients, the excess cost of care among patients who developed sepsis was $29,081 (95%CI, $28,404-$29,757) in the first year, rising to $60,714 (95%CI, $59,729-$61,698) over 5 years. This was higher for haematology patients; $46,154 (95%CI, $45,505-$46,804) in year 1, increasing to $75,931 (95%CI, $74,895-$76,968). Conclusions Sepsis imposes substantial economic burden and can result in a doubling of cancer care costs, particularly during the first year of cancer diagnosis. These estimates are helpful in improving our understanding of burden of sepsis along the cancer pathway and to deploy targeted strategies to alleviate this burden.
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- 2021
9. Estimating the clinical cost of drug development for orphan versus non-orphan drugs
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Kavisha Jayasundara, Aidan Hollis, Murray Krahn, Muhammad Mamdani, Jeffrey S. Hoch, and Paul Grootendorst
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Cost of drug development ,Orphan drugs ,Rare diseases ,Medicine - Abstract
Abstract Background High orphan drug prices have gained the attention of payers and policy makers. These prices may reflect the need to recoup the cost of drug development from a small patient pool. However, estimates of the cost of orphan drug development are sparse. Methods Using publicly available data, we estimated the differences in trial characteristics and clinical development costs with 100 orphan and 100 non-orphan drugs. Results We found that the out-of-pocket clinical costs per approved orphan drug to be $166 million and $291 million (2013 USD) per non-orphan drug. The capitalized clinical costs per approved orphan drug and non-orphan drug were estimated to be $291 million and $412 million respectively. When focusing on new molecular entities only, we found that the capitalized clinical cost per approved orphan drug was half that of a non-orphan drug. Conclusions More discussion is needed to better align on which cost components should be included in research and development costs for pharmaceuticals.
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- 2019
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10. A phase II randomized controlled trial of three exercise delivery methods in men with prostate cancer on androgen deprivation therapy
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Shabbir M. H. Alibhai, Daniel Santa Mina, Paul Ritvo, George Tomlinson, Catherine Sabiston, Murray Krahn, Sara Durbano, Andrew Matthew, Padraig Warde, Meagan O’Neill, Narhari Timilshina, Roanne Segal, and Nicole Culos-Reed
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Androgen deprivation therapy ,Cost-effectiveness ,Exercise ,Fatigue ,Patient adherence ,Physical fitness ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Existing evidence demonstrates that 1:1 personal training (PT) improves many adverse effects of androgen deprivation therapy (ADT). Whether less resource-intensive exercise delivery models are as effective remains to be established. We determined the feasibility of conducting a multi-center non-inferiority randomized controlled trial comparing PT with supervised group (GROUP) and home-based (HOME) exercise programs, and obtained preliminary efficacy estimates for GROUP and HOME compared to PT on quality of life (QOL) and physical fitness. Methods Men with prostate cancer on ADT were recruited from one of two experienced Canadian centres and randomized 1:1:1 to PT, GROUP, or HOME. Randomization was stratified by length of ADT use and site. Participants completed moderate intensity aerobic and resistance exercises 4–5 days per week for 6 months with a target 150 min per week of exercise. Exercise prescriptions were individualized and progressed throughout the trial. Feasibility endpoints included recruitment, retention, adherence, and participant satisfaction. The efficacy endpoints QOL, fatigue, and fitness (VO2 peak, grip strength, and timed chair stands) in GROUP and HOME were compared for non-inferiority to PT. Descriptive analyses were used for feasibility endpoints. Between-group differences for efficacy endpoints were examined using Bayesian linear mixed effects models. Results Fifty-nine participants (mean age 69.9 years) were enrolled. The recruitment rate was 25.4% and recruitment was slower than projected. Retention was 71.2%. Exercise adherence as measured through attendance was high for supervised sessions but under 50% by self-report and accelerometry. Satisfaction was high and there was no difference in this measure between all three groups. Between-group differences (comparing both GROUP and HOME to PT) were smaller than the minimum clinically important difference on most measures of QOL, fatigue, and fitness. However, two of six outcomes for GROUP and four of six outcomes for HOME had a > 20% probability of being inferior for GROUP. Conclusions Feasibility endpoints were generally met. Both GROUP and HOME interventions in men with PC on ADT appeared to be similar to PT for multiple efficacy outcomes, although conclusions are limited by a small sample size and cost considerations have not been incorporated. Efforts need to be targeted to improving recruitment and adherence. A larger trial is warranted. Trial registration ClinicalTrials.gov: NCT02046837. Date of registration: January 20, 2014.
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- 2019
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11. Protocol for a phase III RCT and economic analysis of two exercise delivery methods in men with PC on ADT
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Shabbir M. H. Alibhai, Paul Ritvo, Daniel Santa Mina, Catherine Sabiston, Murray Krahn, George Tomlinson, Andrew Matthew, Himu Lukka, Padraig Warde, Sara Durbano, Meagan O’Neill, and S. Nicole Culos-Reed
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Prostate cancer ,Androgen deprivation therapy ,Exercise ,Randomized controlled trial ,Quality of life ,Fatigue ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Androgen deprivation therapy (ADT) is commonly used to treat prostate cancer. However, side effects of ADT often lead to reduced quality of life and physical function. Existing evidence demonstrates that exercise can ameliorate multiple treatment-related side effects for men on ADT, yet adherence rates are often low. The method of exercise delivery (e.g., supervised group in-centre vs. individual home-based) may be important from clinical and economic perspectives; however, few studies have compared different delivery models. Additionally, long-term exercise adherence and an understanding of predictors of adherence are critical to achieving sustained benefits, but such data are lacking. The primary aim of this multi-centre phase III non-inferiority randomized controlled trial is to determine whether a home-based delivery model is non-inferior to a group-based delivery model in terms of benefits in fatigue and fitness in this population. Two other key aims include examining cost-effectiveness and long-term adherence. Methods Men diagnosed with prostate cancer of any stage, starting or continuing on ADT for at least 6 months, fluent in English, and living close to a study centre are eligible. Participants complete five assessments over 12 months (baseline and every 3 months during the 6-month intervention and 6-month follow-up phases), including a fitness assessment and self-report questionnaires. Biological outcomes are collected at baseline, 6, and 12 months. A total of 200 participants will be randomized in a 1:1 fashion to supervised group training or home-based training supported by smartphones, health coaches, and Fitbit technology. Participants are asked to complete 4 to 5 exercise sessions per week, incorporating aerobic, resistance and flexibility training. Outcomes include fatigue, quality of life, fitness measures, body composition, biological outcomes, and program adherence. Cost information will be obtained using patient diary-based self-report and utilities via the EQ-5D. Discussion To disseminate publicly funded exercise programs widely, clinical efficacy and cost-effectiveness have to be demonstrated. The goals of this trial are to provide these data along with an increased understanding of adherence to exercise among men with prostate cancer receiving ADT. Trial registration The trial has been registered at clinicaltrials.gov (Registration # NCT02834416). Registration date was June 2, 2016.
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- 2018
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12. A population-based study of the direct longitudinal health care costs of upper extremity trauma in patients aged 18–65 years
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Heather L. Baltzer, Gillian Hawker, Priscila Pequeno, J. Charles Victor, and Murray Krahn
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General Medicine - Published
- 2023
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13. Personalized treatment of women with early breast cancer: a risk-group specific cost-effectiveness analysis of adjuvant chemotherapy accounting for companion prognostic tests OncotypeDX and Adjuvant!Online
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Beate Jahn, Ursula Rochau, Christina Kurzthaler, Michael Hubalek, Rebecca Miksad, Gaby Sroczynski, Mike Paulden, Marvin Bundo, David Stenehjem, Diana Brixner, Murray Krahn, and Uwe Siebert
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Cost-effectiveness analysis ,Breast cancer ,Adjuvant chemotherapy ,Adjuvant!Online ,OncotypeDX ,Discrete event simulation ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Abstract Background Due to high survival rates and the relatively small benefit of adjuvant therapy, the application of personalized medicine (PM) through risk stratification is particularly beneficial in early breast cancer (BC) to avoid unnecessary harms from treatment. The new 21-gene assay (OncotypeDX, ODX) is a promising prognostic score for risk stratification that can be applied in conjunction with Adjuvant!Online (AO) to guide personalized chemotherapy decisions for early BC patients. Our goal was to evaluate risk-group specific cost effectiveness of adjuvant chemotherapy for women with early stage BC in Austria based on AO and ODX risk stratification. Methods A previously validated discrete event simulation model was applied to a hypothetical cohort of 50-year-old women over a lifetime horizon. We simulated twelve risk groups derived from the joint application of ODX and AO and included respective additional costs. The primary outcomes of interest were life-years gained, quality-adjusted life-years (QALYs), costs and incremental cost-effectiveness (ICER). The robustness of results and decisions derived were tested in sensitivity analyses. A cross-country comparison of results was performed. Results Chemotherapy is dominated (i.e., less effective and more costly) for patients with 1) low ODX risk independent of AO classification; and 2) low AO risk and intermediate ODX risk. For patients with an intermediate or high AO risk and an intermediate or high ODX risk, the ICER is below 15,000 EUR/QALY (potentially cost effective depending on the willingness-to-pay). Applying the AO risk classification alone would miss risk groups where chemotherapy is dominated and thus should not be considered. These results are sensitive to changes in the probabilities of distant recurrence but not to changes in the costs of chemotherapy or the ODX test. Conclusions Based on our modeling study, chemotherapy is effective and cost effective for Austrian patients with an intermediate or high AO risk and an intermediate or high ODX risk. In other words, low ODX risk suggests chemotherapy should not be considered but low AO risk may benefit from chemotherapy if ODX risk is high. Our analysis suggests that risk-group specific cost-effectiveness analysis, which includes companion prognostic tests are essential in PM.
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- 2017
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14. Understanding resource utilization and mortality in COPD to support policy making: A microsimulation study.
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Elizabeth G Bond, Lusine Abrahamyan, Mohammad K A Khan, Andrea Gershon, Murray Krahn, Ping Li, Rajibul Mian, Nicholas Mitsakakis, Mohsen Sadatsafavi, Teresa To, Petros Pechlivanoglou, and Canadian Respiratory Research Network
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Medicine ,Science - Abstract
Chronic obstructive pulmonary disease (COPD) poses a significant but heterogeneous burden to individuals and healthcare systems. Policymakers develop targeted policies to minimize this burden but need personalized tools to evaluate novel interventions and target them to subpopulations most likely to benefit. We developed a platform to identify subgroups that are at increased risk of emergency department visits, hospitalizations and mortality and to provide stratified patient input in economic evaluations of COPD interventions. We relied on administrative and survey data from Ontario, Canada and applied a combination of microsimulation and multi-state modeling methods. We illustrated the functionality of the platform by quantifying outcomes across smoking status (current, former, never smokers) and by estimating the effect of smoking cessation on resource use and survival, by comparing outcomes of hypothetical cohorts of smokers who quit at diagnosis and smokers that continued to smoke post diagnosis. The cumulative incidence of all-cause mortality was 37.9% (95% CI: 34.9, 41.4) for never smokers, 34.7% (95% CI: 32.1, 36.9) for current smokers, and 46.4% (95% CI: 43.6, 49.0) for former smokers, at 14 years. Over 14 years, smokers who did not quit at diagnosis had 16.3% (95% CI: 9.6, 38.4%) more COPD-related emergency department visits than smokers who quit at diagnosis. In summary, we combined methods from clinical and economic modeling to create a novel tool that policymakers and health economists can use to inform future COPD policy decisions and quantify the effect of modifying COPD risk factors on resource utilization and morality.
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- 2020
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15. Health Utility Book (HUB)–Cancer: Protocol for a Systematic Literature Review of Health State Utility Values in Cancer
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Michael James Zoratti, Ting Zhou, Kelvin Chan, Oren Levine, Murray Krahn, Don Husereau, Tammy Clifford, Holger Schunemann, Gordon Guyatt, and Feng Xie
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Medicine (General) ,R5-920 - Abstract
Background. Treatment options in oncology are rapidly advancing, and public payer systems are increasingly under pressure to adopt new but expensive cancer treatments. Cost-utility analyses (CUAs) are used to estimate the relative costs and effects of competing interventions, where health outcomes are measured using quality-adjusted life years (QALYs). Health state utility values (HSUVs) are used to reflect health-related quality of life or health status in the calculation of QALYs. To support reimbursement agencies in the appraisal of oncology drug submissions, which typically include a CUA component, we have proposed a systematic literature review of published HSUV estimates in the field of oncology. Methods. The following databases will be searched: MEDLINE, EMBASE, EconLit, and CINAHL. A team of reviewers, working independently and in duplicate, will evaluate abstracts and full-text publications for eligibility against broad inclusion criteria. Studies using a direct, indirect, or combination approach to eliciting preferences related to cancer or cancer treatments are eligible. Data extraction will capture details of study methodology, participants, health states, and corresponding HSUVs. We will summarize our findings with descriptive analyses at this stage. A pilot review in thyroid cancer is presented to illustrate the proposed methods. Discussion. This systematic review will generate a comprehensive summary of the oncology HSUV literature. As a component of the Health Utility Book (HUB) project, we anticipate that this work will assist both health economic modelers as well as critical reviewers in the development and appraisal of CUAs in oncology.
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- 2019
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16. Factors affecting the delivery of community pharmacist-led medication reviews: evidence from the MedsCheck annual service in Ontario
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Petros Pechlivanoglou, Lusine Abrahamyan, Linda MacKeigan, Giulia P. Consiglio, Lisa Dolovich, Ping Li, Suzanne M. Cadarette, Valeria E. Rac, Jonghyun Shin, and Murray Krahn
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Medication review ,Pharmacy ,Predictors ,Community ,Elderly ,Public aspects of medicine ,RA1-1270 - Abstract
Abstract Background Medication reviews have become part of pharmacy practice across developed countries. This study aimed to identify factors affecting the likelihood of eligible Ontario seniors receiving a pharmacy-led medication review called MedsCheck annual (MCA). Methods We designed a cohort study using a random sample of pharmacy claims for MCA-eligible Ontario seniors using linked administrative data from April 2012 to March 2013. Guided by a conceptual framework, we constructed a generalized-estimating-equations model to estimate the effect of patient, pharmacy and community factors on the likelihood of receiving MCA. Results Of the 2,878,958 eligible claim-dates, 65,605 included an MCA. Compared to eligible individuals who did not receive an MCA, recipients were more likely to have a prior MCA (OR = 3.03), receive a new medication on the claim-date (OR = 1.78), be hypertensive (OR = 1.18) or have a recent hospitalization (OR = 1.07). MCA recipients had fewer medications (e.g., OR = 0.44 for ≥12 medications versus 0–4 medications), and were less likely to receive an MCA in a rural (OR = 0.74) or high-volume pharmacy (OR = 0.65). Conclusions The most important determinant of receiving an MCA was having had a prior MCA. Overall, MCA recipients were healthier, younger, urban-dwelling, and taking fewer medications than non-recipients. Policies regarding current and future medication review programs may need to evolve to ensure that those at greatest need receive timely and comprehensive medication reviews.
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- 2016
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17. Abstract P4-12-11: Eq-5d-5l utility scores for patients with breast cancer
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Sofia Torres, Ahmed Bayoumi, Maureen Trudeau, Ana Beatriz Kinupe Abrahao, Nicholas Mitsakakis, Murray Krahn, and Geoffrey Liu
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Cancer Research ,Oncology - Abstract
Background: The EuroQol- 5 Dimension (EQ-5D) is a generic patient-reported outcome measure widely used to capture meaningful change in health-related quality of life between treatments to inform drug and health technology reimbursement decision making. The EQ-5D-5L (5 level) consists of 5 dimensions (mobility, self-care, usual activities, pain/discomfort, and anxiety/depression) and a visual analogue scale (VAS). Each dimension has 5 levels, ranging from 1 “no problems” to 5 “extreme problems”, generating 3125 distinct health states (HS). The VAS score ranges from 0 (worst health imaginable) to 100 (best health imaginable). We used Canadian Index values to calculate community-weighted utility scores for 5 pre-defined breast cancer (BC) disease states.Methods: This cross-sectional study included adult women diagnosed with stage I to IV BC, who completed EQ-5D-5L, during outpatient clinic visits at two academic cancer centres in Toronto. Participants were classified into 5 disease states, considered relevant both to clinical practice and economic modeling, ranging from primary breast cancer to metastatic disease. EQ-5D-5L scores were described for each disease state, and mean utility scores and VAS scores were calculated.Results: 549 women were included; the mean age was 57 (SD 12) years; 72% had a Charlson Comorbidity Index of 0. A majority reported “Slight” to “Moderate” problems for the “Pain/Discomfort” (60%) and “Anxiety/Depression” (55%) dimensions of EQ-5D-5L; in all other dimensions, most patients reported “No problems”. As expected, patients with metastatic BC had the highest proportion of reported problems. The mean EQ-5D-5L index score was 0.83 (SD 0.13; range 0.36 to 0.95), with a distribution skewed towards full health and a ceiling effect of 20% (n=110; Table 1). Only 126 different self-reported health states were observed in our patient population. Mean VAS was 75 (SD 17.5; range 10 to 100). For early BC, mean index scores were: 0.87 (n=49; SD 0.07) for patients on chemotherapy (+/-targeted therapy); 0.85 (n=212; SD 0.12) for patients on endocrine treatment (+/-targeted therapy); 0.79 (n=16; SD 16) for patients on targeted therapy; and 0.84 (n=129; SD 0.14) for patients not receiving systemic therapy. For metastatic BC, mean index scores were: 0.79 (n=36, SD 14) for patients on chemotherapy (+/-targeted therapy); 0.80 (n=79, SD 0.14) for patients on endocrine treatment (+/-targeted therapy); 0.69 (n=8; SD 0.19) for patients on targeted therapy; and 0.77 (n=20; SD 0.14) for patients not receiving systemic therapy.Conclusions: BC had an impact mainly in the “Pain/Discomfort” and “Anxiety/Depression” dimensions of EQ-5D-5L. A high ceiling effect was observed in this patient population, despite using the 5L version of EQ-5D. EQ-5D-5L health utilities were significantly lower for metastatic BC, but no significant differences were found among various early-stage BC states. Table 1.- Mean EQ-5D-5L Index and VAS scoresEQ-5D-5LIndex ScoresVASDisease StateN (%)Mean (SD)Min-MaxMean (SD)Min-Max1st year after primary BC146 (27)0.85 (0.12)*0.23-0.9576.5(16.6)10-1001st year after recurrence or primary BC13 (2)0.78 (0.21)0.13-0.9568.9(23.3)20-1002nd-5th year after a primary BC or recurrence treated with curative intent185 (34)0.84 (0.11)*0.21-0.9578.3(14.7)36-1006th and following years after a primary BC or recurrence treated with curative intent62 (11)0.86 (0.14)*0.36-0.9581.0(15.6)20-100Metastatic BC143 (26)0.78 (0.14)0.29-0.9567.3(19.2)21-100Total549 (100)0.83 (0.13)0.13-0.9575.0(17.5)10-100*significant difference was found between these disease states and metastatic diseases (P < 0.05). Citation Format: Sofia Torres, Ahmed Bayoumi, Maureen Trudeau, Ana Beatriz Kinupe Abrahao, Nicholas Mitsakakis, Murray Krahn, Geoffrey Liu. Eq-5d-5l utility scores for patients with breast cancer [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P4-12-11.
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- 2022
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18. Abstract P4-10-22: Patient reported symptoms and functional status in breast cancer
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Sofia Torres, Ahmed Bayoumi, Geoffrey Liu, Ana Beatriz Kinupe Abrahao, Nicholas Mitsakakis, Murray Krahn, and Maureen Trudeau
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Cancer Research ,Oncology - Abstract
Background: To improve symptom management in cancer patients, the province of Ontario (Canada) implemented the collection of the Edmonton Symptom Assessment System (ESAS) and Patient-Reported Functional Status (PRFS) tool at cancer centre outpatient visits. ESAS measures 9 symptoms on a scale from 0 (no symptoms) to 10 (worst possible symptom); scores > 4 (moderate to severe) require intervention. The PRFS tool is a version of the Eastern Cooperative Oncology Group performance status tool designed to be completed by the patient; scores range from 0 (“normal with no limitation”) to 4 (“pretty much bedridden, rarely out of bed”). Our main objective was to describe the symptom burden and functional status of breast cancer (BC) patients.Methods: This cross-sectional study included women with stage I-IV BC who completed the ESAS and the PRFS tool during outpatient clinic visits at 2 Toronto academic centres. ESAS and PRFS scores were described for 3 participant groups: women diagnosed with early-stage BC (ESBC= stages I-III) in the year prior to enrolment; women with ESBC diagnosed > 1 year prior to enrolment; and women with metastatic BC. Multivariable logistic regression models were used to identify factors associated with ESAS scores > 4 for each ESAS symptom. Covariates included age, comorbidity, BC subtype, disease group, previous surgery, and current systemic therapy. Results: Of 381 women, 107 (28%) were diagnosed with ESBC ≤ 1 year prior to enrolment; 171 (45%) were diagnosed with ESBC > 1 year prior to enrolment; 103 (27%) had metastatic BC. Mean age was 57 (SD17) years. For ESBC, tiredness had the highest incidence of moderate to severe scores, followed by impaired well-being and anxiety (Table 1). For metastatic BC, impaired well-being had the highest incidence of moderate to severe symptoms, followed by tiredness and anxiety. More than 20% of metastatic BC patients had scores > 4 for pain, drowsiness, shortness of breath and depression. Most reported PRFS scores of 0 (“Normal with no limitations”) or 1 (“Not my normal self, but able to be up and about with fairly normal activities”), but 17% of metastatic BC patients reported a PRFS of 2 (“Not feeling up to most things, but in bed or chair less than half the day”). A comorbidity score ≥1 was associated with moderate to severe depression (OR 2.0; 95%CI 1.1-3.7), lack of appetite (OR 3.1; 95%CI 1.4-6.6), shortness of breath (OR 2.6; 95%CI 1.3-5.2), tiredness (OR 2.0; 95%CI 1.2-3.3) and impaired well-being (OR 2.0; 95%CI 1.2-3.4). Metastatic BC was associated with moderate to severe scores for anxiety (OR 2.3; 95%CI 1.2-4.5), pain (OR 3.0; 95%CI 1.4-6.4) and impaired well-being (OR 2.1; 95%CI 1.1-4.0). Conclusion: A high prevalence of symptom scores > 4 was found both in ESBC and metastatic BC, highlighting the need of symptom screening for all BC patients. Particular attention should be paid to patients with comorbidity scores ≥ 1, who have increased odds of presenting higher symptom scores. Table 1.- Prevalence of ESAS scores ≥ 4 and PRFS scores for each disease group.ESAS SymptomsPercent with ESAS scores ≥ 4 (moderate to severe)Early-Stage Breast Cancer – 1st year (N=107)Early-Stage Breast Cancer – > 1st year (N=171)Metastatic Breast Cancer (N=103)Total (N=381)Pain12.1%14.7%30.1%18.2%Tiredness25.2%30.1%39.8%31.3%Drowsiness1.8%12.9%25.2%16.6%Nausea9.4%3.5%7.8%4.2%Lack of Appetite10.3%7.1%13.6%9.5%Shortness of Breath14%7.6%22.3%12.4%Depression17.7%14.6%22.6%16.5%Anxiety24.3%17.2%35.3%21.3%Well-being1.8%25.7%44.1%30.3%PRFS scoresPercent with PRFS ScoreNormal with no limitations (0)30.8%49.7%28.2%38.6%Not my normal self, but able to be up and about with fairly normal activities (1)52.3%42.1%50.5%47.2%Not feeling up to most things, but in bed or chair less than half the day (2)12.2%4.7%16.5%10%Able to do little activity and spend most of the day in bed or chair (3)3.7%2.3%4.9%3.4%Pretty much bedridden, rarely out of bed (4)---- Citation Format: Sofia Torres, Ahmed Bayoumi, Geoffrey Liu, Ana Beatriz Kinupe Abrahao, Nicholas Mitsakakis, Murray Krahn, Maureen Trudeau. Patient reported symptoms and functional status in breast cancer [abstract]. In: Proceedings of the 2021 San Antonio Breast Cancer Symposium; 2021 Dec 7-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2022;82(4 Suppl):Abstract nr P4-10-22.
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- 2022
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19. Time Costs and Out-of-Pocket Costs in Patients With Chronic Hepatitis C in a Publicly Funded Health System
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Arcturus Phoon, Jeff Powis, Josephine Wong, Karen E. Bremner, Yasmin Saeed, Kate Mason, Nicholas Mitsakakis, Zeny Feng, William Wong, Murray Krahn, and Jordan J. Feld
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Adult ,Male ,Canada ,medicine.medical_specialty ,Adolescent ,Time cost ,Young Adult ,Cost of Illness ,Chronic hepatitis ,Surveys and Questionnaires ,Outcome Assessment, Health Care ,Health care ,Humans ,Medicine ,In patient ,health care economics and organizations ,Aged ,Aged, 80 and over ,Alternative methods ,business.industry ,Health Policy ,Public Health, Environmental and Occupational Health ,Hepatitis C, Chronic ,Middle Aged ,Hospitals ,Confidence interval ,Medical services ,Cross-Sectional Studies ,Caregivers ,Emergency medicine ,Income ,Health Resources ,Resource use ,Female ,Health Expenditures ,business ,Delivery of Health Care - Abstract
Objectives Chronic hepatitis C (CHC) infection affects more than 70 million people worldwide and imposes considerable health and economic burdens on patients and society. This study estimated 2 understudied components of the economic burden, patient out-of-pocket (OOP) costs and time costs, in patients with CHC in a tertiary hospital clinic setting and a community clinic setting. Methods This was a multicenter, cross-sectional study with hospital-based (n = 174) and community-based (n = 101) cohorts. We used a standardized instrument to collect healthcare resource use, time, and OOP costs. OOP costs included patient-borne costs for medical services, nonprescription drugs, and nonmedical expenses related to healthcare visits. Patient and caregiver time costs were estimated using an hourly wage value derived from patient-reported employment income and, where missing, derived from the Canadian census. Sensitivity analysis explored alternative methods of valuing time. Costs were reported in 2020 Canadian dollars. Results The mean 3-month OOP cost was $55 (95% confidence interval [CI] $21-$89) and $299 (95% CI $170-$427) for the community and hospital cohorts, respectively. The mean 3-month patient time cost was $743 (95% CI $485-$1002) (community) and $465 (95% CI $248-$682) (hospital). The mean 3-month caregiver time cost was $31 (95% CI $0-$63) (community) and $277 (95% CI $174-$380) (hospital). Patients with decompensated cirrhosis bore the highest costs. Conclusions OOP costs and patient and caregiver time costs represent a considerable economic burden to patient with CHC, equivalent to 14% and 21% of the reported total 3-month income for the hospital-based and community-based cohorts, respectively.
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- 2022
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20. Cost-effectiveness analysis of genetic tools to predict treatment response in patients with cystic fibrosis
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Yeva Sahakyan, Lusine Abrahamyan, Felix Ratjen, Christine Bear, Lisa Strug, Paul D.W. Eckford, John K. Peel, Murray Krahn, and Beate Sander
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Pulmonary and Respiratory Medicine ,Pediatrics, Perinatology and Child Health - Published
- 2023
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21. A model-based framework for chronic hepatitis C prevalence estimation.
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Abdullah Hamadeh, Zeny Feng, Murray Krahn, and William W L Wong
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Medicine ,Science - Abstract
Chronic hepatitis C (CHC) continues to be a highly burdensome disease worldwide. The often-asymptomatic nature of early-stage CHC means that the disease often remains undiagnosed, leaving its prevalence highly uncertain. This generates significant uncertainty in the planning of hepatitis C eradication programs to meet WHO targets. The aim of this work is to establish a mathematical framework for the estimation of a geographic locale's CHC prevalence and the proportion of its CHC population that remains undiagnosed. A Bayesian MCMC approach is taken to infer these populations from the observed occurrence of CHC-related events using a recently published natural history model of the disease. Using the Canadian context as a specific example, this study estimates that in 2013, the CHC prevalence rate in Canada was 0.63% (95% CI: 0.53% - 0.72%), with 27.1% (95% CI: 19.3% - 36.1%) of the infected population undiagnosed.
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- 2019
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22. Methods for identifying health state transitions from administrative data: the case of metastasis in prostate cancer
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Nicholas Mitsakakis, Karen Bremner, Ruth Croxford, Lusine Abrahamyan, Welson Ryan, Steven Carcone, and Murray Krahn
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Demography. Population. Vital events ,HB848-3697 - Abstract
Introduction Health administrative data are a rich source of population-based information, useful for building state transition models for medical decision making. These models require identification of health state transitions and associated times. Indirect methods are needed to predict this information, as it is rarely available in administrative data. Objectives and Approach We considered a set of criteria to identify transitions to metastasis for prostate cancer patients in administrative data, utilizing dates of diagnostic and medical billing codes for secondary malignancy, palliative radiation therapy, chemotherapy and bone disorders or procedures. We evaluated the criteria using the true date of metastasis from medical charts of 195 patients linked to health care administrative data in Ontario, Canada. We also built a recursive partitioning tree to optimally combine these criteria and construct rules for identifying metastatic patients. For the evaluation, both misclassification and discrepancy between true and predicted dates for the true positives were considered. Results Criteria involving chemotherapy drugs or hospital visits with secondary malignancy ICD10 diagnosis gave the best results, with high sensitivity and specificity. Criteria involving bone related problems, radiation therapy or diagnosis of metastatic cancer in physician billing data were very specific but not sensitive. The criterion involving prescriptions for narcotics was sensitive but not specific. The fitted tree was parsimonious involving only two of the criteria, while improving the accuracy over individual criteria. Most criteria gave a “delayed” prediction, with criterion based on chemotherapy giving on average the smallest delay, as well as exhibiting the least variability. Criteria involving narcotics and bone related problems predicted metastasis date very prematurely, probably triggered by conditions other than prostate cancer. Conclusion/Implications Several criteria from administrative databases satisfactorily classified prostate cancer patients with metastasis. A classification tree was built and improved the results over single criteria, demonstrating the added benefits in using advanced statistical learning methods for this task. However, “transition to metastasis” dates were predicted inaccurately, often with significant delay.
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- 2018
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23. Hepatitis C virus infection in First Nations populations in Ontario from 2006 to 2014: a population-based retrospective cohort analysis
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Murray Krahn, Lyndia Jones, Wanrudee Isaranuwatchai, Karen E. Bremner, Andrew Mendlowitz, Jennifer D. Walker, William Wong, Beate Sander, and Jordan J. Feld
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Male ,Databases, Factual ,Prevalence ,Hepacivirus ,Acquired immunodeficiency syndrome (AIDS) ,medicine ,Humans ,Serologic Tests ,Indigenous Canadians ,Retrospective Studies ,Ontario ,Health Care Rationing ,business.industry ,Sequence Analysis, RNA ,Incidence (epidemiology) ,Research ,Retrospective cohort study ,General Medicine ,Hepatitis C ,Health Care Costs ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,Confidence interval ,Case-Control Studies ,Cohort ,Disease Progression ,Female ,business ,Demography ,Cohort study - Abstract
Background Hepatitis C virus (HCV) infection causes substantial morbidity and mortality in Canada and is of concern among First Nations communities. In partnership with the Ontario First Nations HIV/AIDS Education Circle, we described trends in HCV testing and epidemiologic features among Status First Nations people in Ontario. Methods In this retrospective study, we used health administrative databases for 2006-2014 in Ontario with 3 cohorts of Status First Nations people: those tested for HCV for the first time, those who tested positive for HCV antibodies or RNA, and those with no HCV laboratory or testing records. We examined cohort characteristics, and the annual prevalence and incidence of testing and diagnosis of HCV infection. Outcomes were stratified by region, sex and residence within or outside of First Nations communities. Results During the study period, 2423 Status First Nations people were diagnosed with HCV infection, 20 481 received their first test, and 135 185 had no test record. The point prevalence of ever having been tested increased from 6.3 (95% confidence interval [CI] 6.2-6.5) per 100 people in 2006 to 16.2 (95% CI 16.0-16.4) per 100 people in 2014. The point prevalence of diagnosed HCV infection increased from 0.9 (95% CI 0.9-1.0) to 2.0 (95% CI 1.9-2.0) per 100 people. The incidence of first test and of diagnosis increased from 12.1 (95% CI 11.5-12.6) to 21.3 (95% CI 20.5-22.1) per 1000 person-years and from 1.3 (95% CI 1.1-1.5) to 2.3 (95% CI 2.1-2.6) per 1000 person-years, respectively. Testing, diagnosis and prevalence of HCV infection were consistently higher among people living outside of versus within First Nations communities, but larger increases over time were observed among those living within First Nations communities. Interpretation Testing and diagnosis of HCV infection increased from 2006 to 2014 among Status First Nations people in Ontario. Our findings indicate the need for population-level efforts to eliminate hepatitis C in First Nations communities.
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- 2021
24. Health care costs associated with hepatitis C virus infection in First Nations populations in Ontario: a retrospective matched cohort study
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Andrew B. Mendlowitz, Beate Sander, Lyndia Jones, Jennifer D. Walker, Wanrudee Isaranuwatchai, Karen E. Bremner, Jordan J. Feld, Murray Krahn, and William Wong
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Ontario ,business.industry ,Hepatitis C virus ,Research ,General Medicine ,Hepatitis C ,Hepacivirus ,medicine.disease ,medicine.disease_cause ,Confidence interval ,Cohort Studies ,Liver disease ,Matched cohort ,Acquired immunodeficiency syndrome (AIDS) ,Health care ,medicine ,Humans ,Residence ,business ,Demography ,Retrospective Studies - Abstract
Background: Colonization and marginalization have affected the risk for and experience of hepatitis C virus (HCV) infection for First Nations people in Canada. In partnership with the Ontario First Nations HIV/AIDS Education Circle, we estimated the publicly borne health care costs associated with HCV infection among Status First Nations people in Ontario. Methods: In this retrospective matched cohort study, we used linked health administrative databases to identify Status First Nations people in Ontario who tested positive for HCV antibodies or RNA between 2004 and 2014, and Status First Nations people who had no HCV testing records or only a negative test result (control group, matched 2:1 to case participants). We estimated total and net costs (difference between case and control participants) for 4 phases of care: prediagnosis (6 mo before HCV infection diagnosis), initial (after diagnosis), late (liver disease) and terminal (6 mo before death), until death or Dec. 31, 2017, whichever occurred first. We stratified costs by sex and residence within or outside of First Nations communities. All costs were measured in 2018 Canadian dollars. Results: From 2004 to 2014, 2197 people were diagnosed with HCV infection. The mean net total costs per 30 days of HCV infection were $348 (95% confidence interval [CI] $277 to $427) for the prediagnosis phase, $377 (95% CI $288 to $470) for the initial phase, $1768 (95% CI $1153 to $2427) for the late phase and $893 (95% CI −$1114 to $3149) for the terminal phase. After diagnosis of HCV infection, net costs varied considerably among those who resided within compared to outside of First Nations communities. Net costs were higher for females than for males except in the terminal phase. Interpretation: The costs per 30 days of HCV infection among Status First Nations people in Ontario increased substantially with progression to advanced liver disease and finally to death. These estimates will allow for planning and evaluation of provincial and territorial population-specific hepatitis C control efforts.
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- 2021
25. Association of Neighborhood-Level Material Deprivation With Health Care Costs and Outcome After Stroke
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Richard H. Swartz, Joan Porter, Amy Y.X. Yu, Murray Krahn, Mohammed Rashid, Susan E. Bronskill, Jiming Fang, Eric E. Smith, Manav V. Vyas, Moira K. Kapral, and Peter C. Austin
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education.field_of_study ,business.industry ,Population ,Hazard ratio ,Context (language use) ,medicine.disease ,Cohort ,Health care ,Medicine ,Neurology (clinical) ,Social determinants of health ,business ,education ,Stroke ,Research Article ,Demography ,Cohort study - Abstract
Background and ObjectivesTo determine the association between material deprivation and direct health care costs and clinical outcomes following stroke in the context of a publicly funded universal health care system.MethodsIn this population-based cohort study of patients with ischemic and hemorrhagic stroke admitted to the hospital between 2008 and 2017 in Ontario, Canada, we used linked administrative data to identify the cohort, predictor variables, and outcomes. The exposure was a 5-level neighborhood material deprivation index. The primary outcome was direct health care costs incurred by the public payer in the first year. Secondary outcomes were death and admission to long-term care.ResultsAmong 90,289 patients with stroke, the mean (SD) per-person costs increased with increasing material deprivation, from $50,602 ($55,582) in the least deprived quintile to $56,292 ($59,721) in the most deprived quintile (unadjusted relative cost ratio and 95% confidence interval 1.11 [1.08, 1.13] and adjusted relative cost ratio 1.07 [1.05, 1.10] for least compared to most deprived quintile). People in the most deprived quintile had higher mortality within 1 year compared to the least deprived quintile (adjusted hazard ratio [HR] 1.07 [1.03, 1.12]) as well as within 3 years (adjusted HR 1.09 [1.05, 1.13]). Admission to long-term care increased incrementally with material deprivation and those in the most deprived quintile had an adjusted HR of 1.33 (1.24, 1.43) compared to those in the least deprived quintile.DiscussionMaterial deprivation is a risk factor for increased costs and poor outcomes after stroke. Interventions targeting health inequities due to social determinants of health are needed.Classification of EvidenceThis study provides Class II evidence that the neighborhood-level material deprivation predicts direct health care costs.
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- 2021
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26. Abstract: Direct and Indirect Utilities of Severe Versus Non-Severe Carpal Tunnel Syndrome Patients
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Annie M. Wang, BSc, Helene Retrouvey, MDCM, Murray Krahn, MD, MSc, FRCPC, Steven J. McCabe, MD, MSc, FRCSC, and Heather Baltzer, MSc, MD, FRCSC
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Surgery ,RD1-811 - Published
- 2018
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27. Towards Transparency in the Selection of Published Health Utility Inputs in Cost-Utility Analyses: The Health Utility Application Tool (HAT)
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Mitchell Levine, Don Husereau, Kelvin K. W. Chan, Michael J. Zoratti, Lehana Thabane, Feng Xie, and Murray Krahn
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Canada ,medicine.medical_specialty ,Knowledge management ,Cost-Benefit Analysis ,Context (language use) ,Computer-assisted web interviewing ,Health administration ,03 medical and health sciences ,0302 clinical medicine ,Research participant ,medicine ,Humans ,030212 general & internal medicine ,Pharmacology ,Health economics ,business.industry ,030503 health policy & services ,Health Policy ,Public health ,Publications ,Public Health, Environmental and Occupational Health ,Transparency (behavior) ,Research Design ,Outcomes research ,0305 other medical science ,Psychology ,business - Abstract
Evaluating the relevance of published health utilities to the context of a cost-utility analysis (CUA) remains an essential, yet often overlooked, task. The objective of this study was to provide guidance on this process through the development of the Health utility Application Tool (HAT). We conducted semi-structured telephone interviews with Canadian stakeholders from reimbursement bodies, academia, and the pharmaceutical industry to identify current practices and perspectives of the application of the health utility literature to CUAs. An online survey with international members of the general health economics and outcomes research community was also conducted to gather opinions on key concepts. Based on the themes emerging from the interviews and online questionnaire, the HAT includes questions prompting investigators to consider the following constructs: similarity of the clinical condition in the health utility study and the CUA; similarity of health utility study participant demographics and the demographics of the CUA’s target population; similarity of the health state descriptions in the health utility study and the CUA; and the method of assigning utility weights. Considerations of transparency prompted additional items, including: means by which the health utility study was identified; type of respondents; study design; and measure used to collect health utility estimates. The HAT is intended to guide the evaluation of the applicability of published health utilities for a CUA, thus promoting transparency and accountability in the selection of model inputs.
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- 2021
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28. A Randomized Controlled Trial of an Exercise Maintenance Intervention in Men and Women After Cardiac Rehabilitation (ECO-PCR Trial)
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Amy E. Mark, Chris M. Blanchard, Stephanie A. Prince, Caroline Chessex, Andrew L. Pipe, Jennifer Harris, Guy-Anne Proulx, Evyanne Wooding, Kerri A. Mullen, Mahshid Moghei, Murray Krahn, Robert D. Reid, Gabriela Lima de Melo Ghisi, and Sherry L. Grace
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Male ,medicine.medical_specialty ,Randomization ,medicine.medical_treatment ,Psychological intervention ,030204 cardiovascular system & hematology ,law.invention ,Treatment and control groups ,03 medical and health sciences ,0302 clinical medicine ,Superiority Trial ,Randomized controlled trial ,Quality of life ,law ,medicine ,Humans ,Single-Blind Method ,030212 general & internal medicine ,Cardiac Rehabilitation ,Rehabilitation ,business.industry ,Exercise Therapy ,Blood pressure ,Physical therapy ,Female ,Cardiology and Cardiovascular Medicine ,business - Abstract
Background Exercise maintenance interventions are needed for cardiac rehabilitation (CR) graduates to maintain moderate and vigorous-intensity physical activity (MVPA). We tested an exercise facilitator intervention (EFI) to promote exercise maintenance compared with usual care (UC) separately in men and women. Methods This was a 3-site, randomized (1:1), parallel-group, superiority trial (ECO-PCR). CR graduates were stratified by site and sex and randomly allocated (concealed). EFI participants received a face-to-face introductory session, 5 small-group counseling teleconferences, and 3 personal calls from a trained facilitator over 50 weeks. In-person assessments were undertaken at baseline and 26 and 52 weeks after randomization. The primary outcome was weekly minutes of MVPA, measured by accelerometer. Secondary outcomes were exercise capacity, risk factors, quality of life, and enrollment in community-based exercise programs. Effects were tested with the use of linear mixed models. Results A total of 449 CR graduates (135 women, 314 men) were randomised (n = 226 EFI, n = 223 UC). In the intention-to-treat analysis for men and for women, there were no significant effects for treatment or time on MVPA. In a planned secondary analysis that considered only those adherent to EFI (completed ≥ 66% of sessions; per-protocol), bouted MVPA (ie, in sustained bouts of ≥ 10 min) was higher in women in the EFI group (mean = 132.6 ± 135.2 min/wk at 52 weeks) compared with UC (111.8 ± 113.1; P = 0.013). Regarding secondary outcomes, in women, a treatment group main effect was observed for blood pressure (P = 0.011) and exercise capacity (P = 0.019; both per-protocol) favouring EFI; no other differences were observed. Conclusions In this trial of CR completers, an EFI showed promise for women, but was ineffective in men.
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- 2021
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29. Evaluating the conduct and application of health utility studies: a review of critical appraisal tools and reporting checklists
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Don Husereau, Peep F. M. Stalmeier, Kelvin K. W. Chan, Lehana Thabane, Andrew Lloyd, Mitchell Levine, Daniel A. Ollendorf, Murray Krahn, John Brazier, Michael J. Zoratti, A. Simon Pickard, and Feng Xie
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Cost–utility analysis ,medicine.medical_specialty ,Health economics ,Management science ,business.industry ,Computer science ,030503 health policy & services ,Health Policy ,Public health ,media_common.quotation_subject ,Economics, Econometrics and Finance (miscellaneous) ,MEDLINE ,Context (language use) ,03 medical and health sciences ,Critical appraisal ,0302 clinical medicine ,Health care ,medicine ,Quality (business) ,030212 general & internal medicine ,0305 other medical science ,business ,media_common - Abstract
Published health utility studies are increasingly cited in cost–utility analyses to inform reimbursement decision-making. However, there is limited guidance for investigators looking to systematically evaluate the methodological quality of health utility studies or their applicability to decision contexts. To describe how health utility concepts are reflected in tools intended for use with the health economic literature, particularly with respect to the evaluation of methodological quality and context applicability. We reviewed the critical appraisal and reporting tools described in a 2012 report published by the Agency for Healthcare Research and Quality (AHRQ), supplemented with a keyword search of MEDLINE and EMBASE, to identify existing tools which include health utility constructs. From these tools, a list of relevant items was compiled and grouped into domain categories based on the methodological or applicability aspect they were directed toward. Of the 24 tools we identified, 12 contained items relevant to the evaluation of health utilities. Sixty-five items were considered relevant to the evaluation of quality, while 44 were relevant to the evaluation of applicability. Items were arranged into four domains: health state descriptions; selection and description of respondents; elicitation and measurement methods; and other considerations. As key inputs to cost–utility analyses, health utilities have the potential to significantly impact estimates of cost-effectiveness. Existing tools contain only general items related to the conduct or use of health utility studies. There is a need to develop tools that systematically evaluate the methodological quality and applicability of health utility studies.
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- 2021
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30. Fibrinogen Concentrate vs Cryoprecipitate for Treating Acquired Hypofibrinogenemia in Bleeding Adult Cardiac Surgical Patients: A Within-trial Economic Evaluation of the FIBRES Randomized Controlled Trial
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Lusine Abrahamyan, Fleur Doudney, George Tomlinson, Jeannie Callum, Steven Carcone, Deep Grewal, Justyna Bartoszko, Murray Krahn, and Keyvan Karkouti
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Biochemistry (medical) ,Clinical Biochemistry ,Hematology - Published
- 2023
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31. A population-based matched cohort study examining the mortality and costs of patients with community-onset Clostridium difficile infection identified using emergency department visits and hospital admissions.
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Natasha Nanwa, Beate Sander, Murray Krahn, Nick Daneman, Hong Lu, Peter C Austin, Anand Govindarajan, Laura C Rosella, Suzanne M Cadarette, and Jeffrey C Kwong
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Medicine ,Science - Abstract
Few studies have evaluated the mortality or quantified the economic burden of community-onset Clostridium difficile infection (CDI). We estimated the attributable mortality and costs of community-onset CDI. We conducted a population-based matched cohort study. We identified incident subjects with community-onset CDI using health administrative data (emergency department visits and hospital admissions) in Ontario, Canada between January 1, 2003 and December 31, 2010. We propensity-score matched each infected subject to one uninfected subject and followed subjects in the cohort until December 31, 2011. We evaluated all-cause mortality and costs (unadjusted and adjusted for survival) from the healthcare payer perspective (2014 Canadian dollars). During our study period, we identified 7,950 infected subjects. The mean age was 63.5 years (standard deviation = 22.0), 62.7% were female, and 45.0% were very high users of the healthcare system. The relative risk for 30-day, 180-day, and 1-year mortality were 7.32 (95% confidence interval [CI], 5.94-9.02), 3.55 (95%CI, 3.17-3.97), and 2.59 (95%CI, 2.37-2.83), respectively. Mean attributable cumulative 30-day, 180-day, and 1-year costs (unadjusted for survival) were $7,434 (95%CI, $7,122-$7,762), $12,517 (95%CI, $11,687-$13,366), and $13,217 (95%CI, $12,062-$14,388). Mean attributable cumulative 1-, 2-, and 3-year costs (adjusted for survival) were $10,700 (95%CI, $9,811-$11,645), $13,312 (95%CI, $12,024-$14,682), and $15,812 (95%CI, $14,159-$17,571). Infected subjects had considerably higher risk of all-cause mortality and costs compared with uninfected subjects. This study provides insight on an understudied patient group. Our study findings will facilitate assessment of interventions to prevent community-onset CDI.
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- 2017
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32. Health care costs associated with chronic hepatitis C virus infection in Ontario, Canada: a retrospective cohort study
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Zhan Yao, Murray Krahn, Beate Sander, Karen E. Bremner, William Wong, Andrew Calzavara, Nicholas Mitsakakis, Alex Haines, Jeffrey C. Kwong, and Hla-Hla Thein
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Adult ,Liver Cirrhosis ,Male ,medicine.medical_specialty ,Carcinoma, Hepatocellular ,Cirrhosis ,Adolescent ,Hepatitis C virus ,medicine.medical_treatment ,Population ,Liver transplantation ,medicine.disease_cause ,Antiviral Agents ,Cohort Studies ,Young Adult ,Internal medicine ,medicine ,Humans ,education ,Aged ,Retrospective Studies ,Aged, 80 and over ,Ontario ,education.field_of_study ,business.industry ,Research ,Liver Neoplasms ,Retrospective cohort study ,Health Care Costs ,General Medicine ,Hepatitis C, Chronic ,Middle Aged ,medicine.disease ,Comorbidity ,Confidence interval ,Liver Transplantation ,Hepatocellular carcinoma ,Female ,business - Abstract
Background High-quality estimates of health care costs are required to understand the burden of illness and to inform economic models. We estimated the costs associated with hepatitis C virus (HCV) infection from the public payer perspective in Ontario, Canada. Methods In this population-based retrospective cohort study, we identified patients aged 18-105 years diagnosed with chronic HCV infection in Ontario from 2003 to 2014 using linked administrative data. We allocated the time from diagnosis until death or the end of follow-up (Dec. 31, 2016) to 9 mutually exclusive health states using validated algorithms: no cirrhosis, no cirrhosis (RNA negative) (i.e., cured HCV infection), compensated cirrhosis, decompensated cirrhosis, hepatocellular carcinoma, both decompensated cirrhosis and hepatocellular carcinoma, liver transplantation, terminal (liver-related) and terminal (non-liver-related). We estimated direct medical costs (in 2018 Canadian dollars) per 30 days per health state and used regression models to identify predictors of the costs. Results We identified 48 239 patients with chronic hepatitis C, of whom 30 763 (63.8%) were men and 35 891 (74.4%) were aged 30-59 years at diagnosis. The mean 30-day costs were $798 (95% confidence interval [CI] $780-$816) (n = 43 568) for no cirrhosis, $661 (95% CI $630-$692) (n = 6422) for no cirrhosis (RNA negative), $1487 (95% CI $1375-$1599) (n = 4970) for compensated cirrhosis, $3659 (95% CI $3279-$4039) (n = 3151) for decompensated cirrhosis, $4238 (95% CI $3480-$4996) (n = 550) for hepatocellular carcinoma, $8753 (95% CI $7130-$10 377) (n = 485) for both decompensated cirrhosis and hepatocellular carcinoma, $4539 (95% CI $3746-$5333) (n = 372) for liver transplantation, $11 202 (95% CI $10 645-$11 760) (n = 3201) for terminal (liver-related) and $8801 (95% CI $8331-$9271) (n = 5278) for terminal (non-liver-related) health states. Comorbidity was the most significant predictor of total costs for all health states. Interpretation Our findings suggest that the financial burden of HCV infection is substantially higher than previously estimated in Canada. Our comprehensive, up-to-date cost estimates for clinically defined health states of HCV infection should be useful for future economic evaluations related to this disorder.
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- 2021
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33. Disease Burden of Chronic Hepatitis B among Immigrants in Canada
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William WL Wong, Gloria Woo, E Jenny Heathcote, and Murray Krahn
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
BACKGROUND: The prevalence of chronic hepatitis B (CHB) infection among immigrants to North America ranges from 2% to 15%, 40% of whom develop advanced liver disease. Screening for hepatitis B surface antigen is not recommended for immigrants.
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- 2013
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34. Sepsis-Associated Mortality, Resource Use, and Healthcare Costs: A Propensity-Matched Cohort Study*
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Robert Talarico, Alan J Forster, Lauralyn McIntyre, Kednapa Thavorn, Kelly Farrah, Dean Fergusson, Christopher J. Doig, Monica Taljaard, Doug Coyle, and Murray Krahn
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Adult ,Male ,medicine.medical_specialty ,Population ,Aftercare ,Critical Care and Intensive Care Medicine ,Patient Readmission ,Insurance Coverage ,Cohort Studies ,Sepsis ,Internal medicine ,medicine ,Humans ,Hospital Mortality ,Propensity Score ,education ,Aged ,Proportional Hazards Models ,Ontario ,Cross Infection ,education.field_of_study ,business.industry ,Proportional hazards model ,Mortality rate ,Organ dysfunction ,Hazard ratio ,Middle Aged ,medicine.disease ,Patient Discharge ,Intensive Care Units ,Cohort ,medicine.symptom ,business ,Cohort study - Abstract
Objectives To examine long-term mortality, resource utilization, and healthcare costs in sepsis patients compared to hospitalized nonsepsis controls. Design Propensity-matched population-based cohort study using administrative data. Setting Ontario, Canada. Patients We identified a cohort of adults (≥ 18) admitted to hospitals in Ontario between April 1, 2012, and March 31, 2016, with follow-up to March 31, 2017. Sepsis patients were flagged using a validated International Classification of Diseases, 10th Revision-coded algorithm (Sepsis-2 definition), including cases with organ dysfunction (severe sepsis) and without (nonsevere). Remaining hospitalized patients were potential controls. Cases and controls were matched 1:1 on propensity score, age, sex, admission type, and admission date. Interventions None. Measurements and main results Differences in mortality, rehospitalization, hospital length of stay, and healthcare costs were estimated, adjusting for remaining confounders using Cox regression and generalized estimating equations. Of 270,669 sepsis cases, 196,922 (73%) were successfully matched: 64,204 had severe and 132,718 nonsevere sepsis (infection without organ dysfunction). Over follow-up (median 2.0 yr), severe sepsis patients had higher mortality rates than controls (hazard ratio, 1.66; 95% CI, 1.63-1.68). Both severe and nonsevere sepsis patients had higher rehospitalization rates than controls (hazard ratio, 1.53; 95% CI, 1.50-1.55 and hazard ratio, 1.41; 95% CI, 1.40-1.43, respectively). Incremental costs (Canadian dollar 2018) in sepsis cases versus controls at 1-year were: $29,238 (95% CI, $28,568-$29,913) for severe and $9,475 (95% CI, $9,150-$9,727) for nonsevere sepsis. Conclusions Severe sepsis was associated with substantially higher long-term risk of death, rehospitalization, and healthcare costs, highlighting the need for effective postdischarge care for sepsis survivors.
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- 2020
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35. Estimating chronic hepatitis C prevalence in British Columbia and Ontario, Canada, using population‐based cohort studies
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Alex Haines, Hla-Hla Thein, William Wong, Naveed Z. Janjua, Murray Krahn, Abdullah Hamadeh, and Zeny Feng
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Hepatitis C virus ,Population ,Disease ,medicine.disease_cause ,Antiviral Agents ,Cohort Studies ,03 medical and health sciences ,0302 clinical medicine ,Chronic hepatitis ,Virology ,Prevalence ,Humans ,Medicine ,030212 general & internal medicine ,education ,Retrospective Studies ,Subclinical infection ,Ontario ,education.field_of_study ,British Columbia ,Hepatology ,business.industry ,Retrospective cohort study ,Hepatitis C, Chronic ,Natural history ,Infectious Diseases ,Cohort ,030211 gastroenterology & hepatology ,business ,Demography - Abstract
Patients identified as having chronic hepatitis C (CHC) infection can be effectively and rapidly treated using direct-acting antiviral agents. However, there remains a substantial burden of subclinical undetected infection. This study estimates the prevalence and undiagnosed proportion of CHC in British Columbia (BC) and Ontario, Canada using a model-based approach, informed by provincial population-level health administrative data. A two-step approach was used: Step 1) Two population-based retrospective analyses of administrative health data for a cohort of British Columbians and a cohort of Ontarians with CHC were conducted to generate population-level statistics of CHC-related health events; Step 2) using a validated natural history model of hepatitis C virus (HCV) infection and back-calculated the historical prevalence of CHC from the data collected in Step 1. Our retrospective study found that, in BC and Ontario, the number of newly diagnosed CHC cases is declining yearly while the complications of the disease are increasing yearly. BC had a 2014 CHC prevalence of 1.04% (95% CI: 0.84%-1.44%), with 33.3% (95% CI: 25.5%-42.0%) of CHC cases undiagnosed. Ontario had a 2014 CHC prevalence of 0.91% (95% CI: 0.83%-1.02%) with 36.0% (95% CI: 31.2%-38.9%) of CHC cases undiagnosed. Our study offers robust estimates based on the integration of a validated natural history model with population-level health administrative data on HCV-related events, which can provide vital evidence for policy-makers to develop appropriate policies to achieve the elimination targets. Our approach can also be applied and used to produce robust region-specific estimates in other countries.
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- 2020
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36. Effects of six months of aerobic and resistance training on metabolic markers and bone mineral density in older men on androgen deprivation therapy for prostate cancer
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Padraig Warde, Amna Iqbal, Nicole Culos-Reed, Catherine M. Sabiston, Meagan O'Neill, Sara Durbano, Daniel Santa Mina, Narhari Timilshina, Efthymios Papadopoulos, Paul Ritvo, Andrew Matthew, George Tomlinson, Shabbir M.H. Alibhai, and Murray Krahn
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Male ,medicine.medical_specialty ,law.invention ,Androgen deprivation therapy ,03 medical and health sciences ,Prostate cancer ,0302 clinical medicine ,Randomized controlled trial ,Bone Density ,law ,Internal medicine ,medicine ,Humans ,030212 general & internal medicine ,Aged ,Femoral neck ,Bone mineral ,medicine.diagnostic_test ,business.industry ,Prostatic Neoplasms ,Androgen Antagonists ,Resistance Training ,medicine.disease ,medicine.anatomical_structure ,Oncology ,030220 oncology & carcinogenesis ,Androgens ,Biomarker (medicine) ,Geriatrics and Gerontology ,Exercise prescription ,Lipid profile ,business - Abstract
Background Androgen deprivation therapy (ADT) for prostate cancer (PCa) is associated with metabolic perturbations and declines in bone mineral density (BMD). Exercise interventions provide multiple health benefits to older men on ADT; however, their effect on metabolic biomarkers and BMD remains unclear. Methods A secondary analysis of a phase II randomized controlled trial was conducted to assess the effect of a six-month moderate-intensity aerobic and resistance exercise program on metabolic biomarkers and BMD in men on ADT. Participants were randomized to three different exercise delivery models: personal training; supervised group exercise; or home-based exercise. Analysis of metabolic biomarkers (lipid profile and glucose) was conducted at baseline, six and twelve months. BMD of the lumbar spine, femoral neck and hip were assessed at baseline and twelve months. Both within- and between-group analyses of change scores adjusted for baseline values were performed. Results Forty-eight men (mean age 69.8y) were enrolled. Baseline values of metabolic biomarkers and BMD were comparable between groups and the three groups were combined for the primary analysis. At six months, no changes in metabolic biomarkers were found; however, at twelve months low-density lipoprotein (+0.28 mmol/L; 95%CI, 0.04 to 0.51) and total cholesterol (+0.31 mmol/L; 95%CI, 0.00 to 0.61) were significantly increased from baseline. No changes were found in BMD. In a secondary between-group analysis, no improvements were observed for any metabolic biomarker or BMD measurement. Conclusions Different exercise prescription parameters (modality and intensity) or combined diet/exercise interventions may be needed to foster favorable metabolic and skeletal adaptations during ADT.
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- 2020
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37. Valuing Health State: An EQ-5D-5L Value Set for Ethiopians
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Clara Mukuria, Gebremedhin Beedemariam Gebretekle, Fikre Enquoselassie, Murray Krahn, Teferi Gedif Fenta, Abraham Gebregziabiher Welie, and Elly A. Stolk
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Psychometrics ,Computer science ,Health Status ,Economics, Econometrics and Finance (miscellaneous) ,Population ,Pilot Projects ,Time-trade-off ,03 medical and health sciences ,0302 clinical medicine ,EQ-5D ,Statistics ,Humans ,030212 general & internal medicine ,education ,Pharmacology, Toxicology and Pharmaceutics (miscellaneous) ,Valuation (finance) ,education.field_of_study ,Cost–utility analysis ,030503 health policy & services ,Health Policy ,Reproducibility of Results ,Health technology ,Regression analysis ,Translating ,Cross-Sectional Studies ,Quota sampling ,Quality of Life ,Ethiopia ,0305 other medical science - Abstract
Objectives There is a growing interest in health technology assessment and economic evaluations in developing countries such as Ethiopia. The objective of this study was to derive an EQ-5D-5L value set from the Ethiopian general population to facilitate cost utility analysis. Methods A nationally representative sample (N = 1050) was recruited using a stratified multistage quota sampling technique. Face-to-face, computer-assisted interviews using the EuroQol Portable Valuation Technology (EQ-PVT) protocol of composite time trade-off (c-TTO) and discrete choice experiments (DCEs) were undertaken to elicit preference scores. The feasibility of the EQ-PVT protocol was pilot tested in a sample of the population (n = 110). A hybrid regression model combining c-TTO and DCE data was used to estimate the final value set. Results In the pilot study, the acceptability of the tasks was good, and there were no special concerns with undertaking the c-TTO and DCE tasks. The coefficients generated from a hybrid model were logically consistent. The predicted values for the EQ-5D-5L ranged from −0.718 to 1. Level 5 anxiety/depression had the largest impact on utility decrement (−0.458), whereas level 5 self-care had the least impact (−0.222). The maximum predicted value beyond full health was 0.974 for the 11112 health state. Conclusions This is the first EQ-5D-5L valuation study in Africa using international valuation methods (c-TTO and DCE) and also the first using the EQ-PVT protocol to derive a value set. We expect that the availability of this value set will facilitate health technology assessment and health-related quality-of-life research and inform policy decision making in Ethiopia.
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- 2020
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38. Challenges in the adoption of regenerative medicine therapies, meeting summary
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Karen E. Bremner, Murray Krahn, Maya Chaddah, Ann Perry, James Kusena, Allison Brown, and Siofradh McMahon
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business.industry ,Medicine ,Engineering ethics ,business ,General Economics, Econometrics and Finance ,Regenerative medicine - Published
- 2020
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39. Direct and indirect utilities of patients with mild to moderate versus severe carpal tunnel syndrome
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Heather L. Baltzer, Annie M Q Wang, Steven J. McCabe, Helene Retrouvey, and Murray Krahn
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030222 orthopedics ,medicine.medical_specialty ,Health utility ,business.industry ,Visual analogue scale ,Retrospective cohort study ,medicine.disease ,Carpal Tunnel Syndrome ,03 medical and health sciences ,0302 clinical medicine ,Quality of life ,Surveys and Questionnaires ,Economic evaluation ,Quality of Life ,Physical therapy ,Humans ,Medicine ,Surgery ,Standard gamble ,030212 general & internal medicine ,business ,Carpal tunnel syndrome ,Pain Measurement ,Retrospective Studies ,Decision analysis - Abstract
Health utility is a quantitative global measure of patients’ health status. This retrospective cohort study aimed to compare health utilities of patients with mild to moderate versus severe carpal tunnel syndrome and determine inter-instrumental agreement. Health utilities of 29 patients with varying severity of carpal tunnel syndrome were measured indirectly by Short-Form Sixth Dimension and EuroQol 5D questionnaire and directly by Chained Standard Gamble and a visual analogue scale. Health utility was 0.69 for Short-Form Sixth Dimension, 0.78 for EuroQol 5D Questionnaire, 0.98 for Chained Standard Gamble, and 0.76 for the visual analogue scale. There was a significant inter-instrumental agreement between three of the instruments, but not the Chained Standard Gamble. The difference in health utilities between patients with mild or moderate versus severe carpal tunnel syndrome was significant only for the EuroQol 5D questionnaire. We conclude based on our results that there are no clear indications on how health utilities can be integrated into decision analysis models and economic evaluation regarding carpal tunnel syndrome of various severities . Level of evidence: IV
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- 2020
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40. Mapping the <scp>EORTC QLQ‐C30</scp> and <scp>QLQ‐H</scp> & <scp>N35</scp> , onto <scp>EQ‐5D‐5L</scp> and <scp>HUI</scp> ‐3 indices in patients with head and neck cancer
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John R. de Almeida, Aaron R. Hansen, Murray Krahn, Christopher W. Noel, David P. Goldstein, J. Su, Robert F Stephens, Meredith Giuliani, Wei Xu, and Eric Monteiro
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Oncology ,Predictive validity ,medicine.medical_specialty ,business.industry ,030503 health policy & services ,Eortc qlq c30 ,Head and neck cancer ,Subgroup analysis ,social sciences ,medicine.disease ,humanities ,03 medical and health sciences ,0302 clinical medicine ,Otorhinolaryngology ,Disease severity ,EQ-5D ,Internal medicine ,Mapping algorithm ,medicine ,In patient ,030212 general & internal medicine ,0305 other medical science ,business - Abstract
Background We sought to develop mapping functions that use EORTC responses to approximate health utility (HU) scores for patients with head and neck cancer (HNC). Methods In total, 209 outpatients with HNC completed the EORTC QLQ-C30 & QLQ-H&N35 (EORTC), EQ-5D-5L and the HUI-3. Results of the EORTC were mapped onto both EQ-5D-5L and HUI-3 scores using ordinary least squares regression and two-part models. Results The OLS model mapping EORTC onto the EQ-5D-5L performed best (adjusted R2 = .75, 10-fold cross-validation RMSE = 0.064, MAE 0.050). The HUI-3 model mapping onto EORTC through OLS was more limited (adjusted R2 = .5746, 10-fold cross cross-validation RMSE = 0.168, MAE 0.080). The EQ-5D-5L model was able to discriminate between certain clinical indices of disease severity on subgroup analysis. Conclusion The EORTC to EQ-5D-5L mapping algorithm has good predictive validity and may enable researchers to translate EORTC scores into HU scores for head and neck patients with cancer.
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- 2020
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41. Pharmacological Acromegaly Treatment: Cost-Utility and Value of Information Analysis
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Murray Krahn, Letícia P. Leonart, Roberto Pontarolo, and Bruno Salgado Riveros
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medicine.medical_specialty ,National Health Programs ,Cost effectiveness ,Cost-Benefit Analysis ,Endocrinology, Diabetes and Metabolism ,Antineoplastic Agents ,030209 endocrinology & metabolism ,Octreotide ,Lanreotide ,Peptides, Cyclic ,030218 nuclear medicine & medical imaging ,Value of information ,03 medical and health sciences ,Cellular and Molecular Neuroscience ,chemistry.chemical_compound ,0302 clinical medicine ,Endocrinology ,Quality of life ,Internal medicine ,Outcome Assessment, Health Care ,medicine ,Humans ,health care economics and organizations ,Actuarial science ,Human Growth Hormone ,Endocrine and Autonomic Systems ,business.industry ,Hormones ,Pasireotide ,Clinical research ,chemistry ,Acromegaly ,Pegvisomant ,Cohort ,Somatostatin ,business ,Brazil ,medicine.drug - Abstract
Objectives: To conduct a cost-utility analysis comparing drug strategies involving octreotide, lanreotide, pasireotide, and pegvisomant for the treatment of patients with acromegaly who have failed surgery, from a Brazilian public payer perspective. Methods: A probabilistic cohort Markov model was developed. One-year cycles were employed. The patients started at 45 years of age and were followed lifelong. Costs, efficacy, and quality of life parameters were retrieved from the literature. A discount rate (5%) was applied to both costs and efficacy. The results were reported as costs per quality-adjusted life year (QALY), and incremental cost-effectiveness ratios (ICERs) were calculated when applicable. Scenario analyses considered alternative dosages, discount rate, tax exemption, and continued use of treatment despite lack of response. Value of information (VOI) analysis was conducted to explore uncertainty and to estimate the costs to be spent in future research. Results: Only lanreotide showed an ICER reasonable for having its use considered in clinical practice (R$ 112,138/US$ 28,389 per QALY compared to no treatment). Scenario analyses corroborated the base-case result. VOI analysis showed that much uncertainty surrounds the parameters, and future clinical research should cost less than R$ 43,230,000/US$ 10,944,304 per year. VOI also showed that almost all uncertainty that precludes an optimal strategy choice involves quality of life. Conclusions: With current information, the only strategy that can be considered cost-effective in Brazil is lanreotide treatment. No second-line treatment is recommended. Significant uncertainty of parameters impairs optimal decision-making, and this conclusion can be generalized to other countries. Future research should focus on acquiring utility data.
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- 2020
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42. Comparing Childhood Cancer Care Costs in Two Canadian Provinces
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Mary L. McBride, Paul C. Nathan, Stuart Peacock, Murray Krahn, Karen E. Bremner, Claire de Oliveira, Mark L. Greenberg, Ning Liu, Ross Duncan, and Paul Rogers
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medicine.medical_specialty ,Adolescent ,Databases, Factual ,Cost estimate ,Childhood cancer ,MEDLINE ,03 medical and health sciences ,0302 clinical medicine ,Neoplasms ,Survivorship curve ,Health care ,medicine ,Humans ,030212 general & internal medicine ,Child ,health care economics and organizations ,Ontario ,British Columbia ,Continuing care ,business.industry ,030503 health policy & services ,Cancer ,Health Care Costs ,medicine.disease ,Child, Preschool ,Family medicine ,0305 other medical science ,business ,Medical costs ,Research Paper - Abstract
Background: Cancer in children presents unique issues for diagnosis, treatment and survivorship care. Phase-specific comparative cost estimates are important for informing healthcare planning. Objectives: The aim of this paper is to compare direct medical costs of childhood cancer by phase of care in British Columbia (BC) and Ontario (ON). Methods: For cancer patients diagnosed at 50% higher in ON. Phase-specific in-patient hospital costs (the major cost category) represented 63%–82% of ON costs, versus 43%–73% of BC costs. Phase-specific diagnostic tests and procedures accounted for 1.0%–3.4% of ON costs and 2.8%–13.0% of BC costs. Conclusions: There are substantial cost differences between these two Canadian provinces, BC and ON, possibly identifying opportunities for healthcare planning improvement.
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- 2020
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43. Cost-effectiveness of Fibrinogen Concentrate vs Cryoprecipitate for Treating Acquired Hypofibrinogenemia in Bleeding Adult Cardiac Surgical Patients
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Lusine Abrahamyan, George Tomlinson, Jeannie Callum, Steven Carcone, Deep Grewal, Justyna Bartoszko, Murray Krahn, and Keyvan Karkouti
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Surgery - Abstract
ImportanceExcessive bleeding requiring fibrinogen replacement is a serious complication of cardiac surgery. However, the relative cost-effectiveness of the 2 available therapies—fibrinogen concentrate and cryoprecipitate—is unknown.ObjectiveTo determine cost-effectiveness of fibrinogen concentrate vs cryoprecipitate for managing active bleeding in adult patients who underwent cardiac surgery.Design, Setting, and ParticipantsA within-trial economic evaluation of the Fibrinogen Replenishment in Surgery (FIBERS) randomized clinical trial (February 2017 to November 2018) that took place at 4 hospitals based in Ontario, Canada, hospitals examined all in-hospital resource utilization costs and allogeneic blood product (ABP) transfusion costs incurred within 28 days of surgery. Participants included a subset of 495 adult patients from the FIBERS trial who underwent cardiac surgery and developed active bleeding and acquired hypofibrinogenemia requiring fibrinogen replacement.InterventionsFibrinogen concentrate (4 g per dose) or cryoprecipitate (10 units per dose) randomized (1:1) up to 24 hours postcardiopulmonary bypass.Main Outcomes and MeasuresEffectiveness outcomes included number of ABPs administered within 24 hours and 7 days of cardiopulmonary bypass. ABP transfusion (7-day) and in-hospital resource utilization (28-day) costs were evaluated and a multivariable net benefit regression model built for the full sample and predefined subgroups.ResultsPatient level costs for 495 patients were evaluated (mean [SD] age 59.2 [15.4] years and 69.3% male.) Consistent with FIBERS, ABP transfusions and adverse events were similar in both treatment groups. Median (IQR) total 7-day ABP cost was CAD $2280 (US dollars [USD] $1697) (CAD $930 [USD $692]-CAD $4970 [USD $3701]) in the fibrinogen concentrate group and CAD $2770 (USD $1690) (IQR, CAD $1140 [USD $849]-CAD $5000 [USD $3723]) in the cryoprecipitate group. Median (interquartile range) total 28-day cost was CAD $38 180 (USD $28 431) $(IQR, CAD $26 350 [USD $19 622]-CAD $65 080 [USD $48 463]) in the fibrinogen concentrate group and CAD $38 790 (USD $28 886) (IQR, CAD $26 180 [USD $19 495]-CAD $70 380 [USD $52 409]) in the cryoprecipitate group. After exclusion of patients who were critically ill before surgery (11%) due to substantial variability in costs, the incremental net benefit of fibrinogen concentrate vs cryoprecipitate was positive (probability of being cost-effective 86% and 97% at $0 and CAD $2000 (USD $1489) willingness-to-pay, respectively). Net benefit was highly uncertain for nonelective and patients with critical illness.Conclusions and RelevanceFibrinogen concentrate is cost-effective when compared with cryoprecipitate in most bleeding adult patients who underwent cardiac surgery with acquired hypofibrinogenemia requiring fibrinogen replacement. The generalizability of these findings outside the Canadian health system needs to be verified.
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- 2023
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44. Health State Utilities and Quality of Life in Patients with Hepatitis B
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Gloria Woo, George Tomlinson, Colina Yim, Les Lilly, George Therapondos, David KH Wong, Wendy Ungar, Thomas R Einarson, Morris Sherman, E Jenny Heathcote, and Murray Krahn
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
BACKGROUND: The effect of chronic hepatitis B (CHB) infection on health-related quality of life (HRQoL) and health state utilities has not been well characterized.
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- 2012
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45. Abstract: Carpal Tunnel Syndrome Management in Breast Cancer Survivors at Risk for Lymphedema: A Markov Model
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Helene Retrouvey, MDCM, Murray Krahn, MD, MSc, FRCPC, and Heather Baltzer, MSc, MD, FRCSC
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Surgery ,RD1-811 - Published
- 2017
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46. PO130 / #769 CONVENTIONAL MEDICAL MANAGEMENT VS CERVICAL SPINAL CORD STIMULATION FOR MANAGEMENT OF CHRONIC CLUSTER HEADACHE: A MARKOV DECISION ANALYSIS
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Yasmine Hoydonckx, Bijan Teja, and Murray Krahn
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Anesthesiology and Pain Medicine ,Neurology ,Neurology (clinical) ,General Medicine - Published
- 2022
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47. Physicians’ Attitudes and Practice Toward Treating Injection Drug Users Infected with Hepatitis C Virus: Results from a National Specialist Survey in Canada
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Angelique Myles, Gerry J Mugford, Jing Zhao, Murray Krahn, and Peizhong Peter Wang
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
BACKGROUND: In Canada, more than 70% of new cases of hepatitis C virus (HCV) infection per year involve injection drug users (IDUs) and, currently, there is no consensus on how to offer them medical care.
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- 2011
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48. Health Care Costs Associated with Hepatitis C: A Longitudinal Cohort Study
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Mel Krajden, Margot Kuo, Brandon Zagorski, Maria Alvarez, Amanda Yu, and Murray Krahn
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Diseases of the digestive system. Gastroenterology ,RC799-869 - Abstract
BACKGROUND: Disease-specific estimates of medical costs are important for health policy decision making.
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- 2010
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49. The Opportunity Cost of Capital
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Ayman Chit PhD, Ahmad Chit CA, Manny Papadimitropoulos PhD, Murray Krahn MD, Jayson Parker PhD, and Paul Grootendorst PhD
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Public aspects of medicine ,RA1-1270 - Abstract
The opportunity cost of the capital invested in pharmaceutical research and development (R&D) to bring a new drug to market makes up as much as half the total cost. However, the literature on the cost of pharmaceutical R&D is mixed on how, exactly, one should calculate this “hidden” cost. Some authors attempt to adopt models from the field of finance, whereas other prominent authors dismiss this practice as biased, arguing that it artificially inflates the R&D cost to justify higher prices for pharmaceuticals. In this article, we examine the arguments made by both sides of the debate and then explain the cost of capital concept and describe in detail how this value is calculated. Given the significant contribution of the cost of capital to the overall cost of new drug R&D, a clear understanding of the concept is critical for policy makers, investors, and those involved directly in the R&D.
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- 2015
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50. No Time to Waste: An Appraisal of Value at the End of Life
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Kieran L. Quinn, Murray Krahn, Thérèse A. Stukel, Yona Grossman, Russell Goldman, Peter Cram, Allan S. Detsky, and Chaim M. Bell
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Health Policy ,Public Health, Environmental and Occupational Health - Abstract
The use of economic evaluations of end-of-life interventions may be limited by an incomplete appreciation of how patients and society perceive value at end of life. The objective of this study was to evaluate how patients, caregivers, and society value gains in quantity of life and quality of life (QOL) at the end of life. The validity of the assumptions underlying the use of the quality-adjusted life-years (QALY) as a measure of preferences at end of life was also examined.MEDLINE, Embase, CINAHL, PsycINFO, and PubMed were searched from inception to February 22, 2021. Original research studies reporting empirical data on healthcare priority setting at end of life were included. There was no restriction on the use of either quantitative or qualitative methods. Two reviewers independently screened, selected, and extracted data from studies. Narrative synthesis was conducted for all included studies. The primary outcomes were the value of gains in quantity of life and the value of gains in QOL at end of life.A total of 51 studies involving 53 981 participants reported that gains in QOL were generally preferred over quantity of life at the end of life across stakeholder groups. Several violations of the underlying assumptions of the QALY to measure preferences at the end of life were observed.Most patients, caregivers, and members of the general public prioritize gains in QOL over marginal gains in life prolongation at the end of life. These findings suggest that policy evaluations of end-of-life interventions should favor those that improve QOL. QALYs may be an inadequate measure of preferences for end-of-life care thereby limiting their use in formal economic evaluations of end-of-life interventions.
- Published
- 2021
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