57 results on '"Stedman, Margaret R."'
Search Results
52. Adolescent and Young Adult Cancer Survival
- Author
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Lewis, Denise Riedel, Seibel, Nita L., Smith, Ashley Wilder, and Stedman, Margaret R.
- Abstract
Adolescent and young adults (AYAs) face challenges in having their cancers recognized, diagnosed, treated, and monitored. Monitoring AYA cancer survival is of interest because of the lack of improvement in outcome previously documented for these patients as compared with younger and older patient outcomes. AYA patients 15–39 years old, diagnosed during 2000–2008 with malignant cancers were selected from the SEER 17 registries data. Selected cancers were analyzed for incidence and five-year relative survival by histology, stage, and receptor subtypes. Hazard ratios were estimated for cancer death risk among younger and older ages relative to the AYA group. AYA survival was worse for female breast cancer (regardless of estrogen receptor status), acute lymphoid leukemia (ALL), and acute myeloid leukemia (AML). AYA survival for AML was lowest for a subtype associated with a mutation of the nucleophosmin 1 gene (NPM1). AYA survival for breast cancer and leukemia remain poor as compared with younger and older survivors. Research is needed to address disparities and improve survival in this age group.
- Published
- 2014
- Full Text
- View/download PDF
53. Current Estimates of the Cure Fraction: A Feasibility Study of Statistical Cure for Breast and Colorectal Cancer
- Author
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Stedman, Margaret R., Feuer, Eric J., and Mariotto, Angela B.
- Abstract
Background The probability of cure is a long-term prognostic measure of cancer survival. Estimates of the cure fraction, the proportion of patients “cured” of the disease, are based on extrapolating survival models beyond the range of data. The objective of this work is to evaluate the sensitivity of cure fraction estimates to model choice and study design.Methods Data were obtained from the Surveillance, Epidemiology, and End Results (SEER)-9 registries to construct a cohort of breast and colorectal cancer patients diagnosed from 1975 to 1985. In a sensitivity analysis, cure fraction estimates are compared from different study designs with short- and long-term follow-up. Methods tested include: cause-specific and relative survival, parametric mixture, and flexible models. In a separate analysis, estimates are projected for 2008 diagnoses using study designs including the full cohort (1975–2008 diagnoses) and restricted to recent diagnoses (1998–2008) with follow-up to 2009.Results We show that flexible models often provide higher estimates of the cure fraction compared to parametric mixture models. Log normal models generate lower estimates than Weibull parametric models. In general, 12 years is enough follow-up time to estimate the cure fraction for regional and distant stage colorectal cancer but not for breast cancer. 2008 colorectal cure projections show a 15% increase in the cure fraction since 1985.Discussion Estimates of the cure fraction are model and study design dependent. It is best to compare results from multiple models and examine model fit to determine the reliability of the estimate. Early-stage cancers are sensitive to survival type and follow-up time because of their longer survival. More flexible models are susceptible to slight fluctuations in the shape of the survival curve which can influence the stability of the estimate; however, stability may be improved by lengthening follow-up and restricting the cohort to reduce heterogeneity in the data.- Published
- 2014
- Full Text
- View/download PDF
54. Physical Function and Mortality in Older Adults with Chronic Kidney Disease.
- Author
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Liu CK, Parvathinathan G, Stedman MR, Seliger SL, Weiner DE, and Tamura MK
- Published
- 2024
- Full Text
- View/download PDF
55. Trends in Coronary Artery Disease Screening before Kidney Transplantation.
- Author
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Cheng XS, Liu S, Han J, Stedman MR, Chertow GM, Tan JC, and Fearon WF
- Subjects
- Adult, Aged, Humans, Medicare, Renal Dialysis, United States epidemiology, Coronary Artery Disease diagnosis, Kidney Transplantation adverse effects, Myocardial Infarction diagnosis
- Abstract
Background: Coronary artery disease (CAD) screening in asymptomatic kidney transplant candidates is widespread but not well supported by contemporary cardiology literature. In this study we describe temporal trends in CAD screening before kidney transplant in the United States., Methods: Using the United States Renal Data System, we examined Medicare-insured adults who received a first kidney transplant from 2000 through 2015. We stratified analysis on the basis of whether the patient's comorbidity burden met guideline definitions of high risk for CAD. We examined temporal trends in nonurgent CAD tests within the year before transplant and the composite of death and nonfatal myocardial infarction in the 30 days after transplant., Results: Of 94,832 kidney transplant recipients, 37,139 (39%) underwent at least one nonurgent CAD test in the 1 year before transplant. From 2000 to 2015, the transplant program waitlist volume had increased as transplant volume stayed constant, whereas patients in the later eras had a slightly higher comorbidity burden (older, longer dialysis vintage, and a higher prevalence of diabetes mellitus and CAD). The likelihood of CAD test in the year before transplant increased from 2000 through 2003 and remained relatively stable thereafter. When stratified by CAD risk status, test rates decreased modestly in patients who were high risk but remained constant in patients who were low risk after 2008. Death or nonfatal myocardial infarction within 30 days after transplant decreased from 3% in 2000 to 2% in 2015. Nuclear perfusion scan was the most frequent modality of testing throughout the examined time periods., Conclusions: CAD testing rates before kidney transplantation have remained constant from 2000 through 2015, despite widespread changes in cardiology guidelines and practice., Competing Interests: G.M. Chertow reports having consultancy agreements with Akebia, Amgen, Ardelyx, AstraZeneca, Baxter, Cricket, DiaMedica, Gilead, Miromatrix, Reata, Sanifit, Unicycive, and Vertex; reports having an ownership interest in Ardelyx, CloudCath, Durect, DxNow, Eliaz Therapeutics, Outset, Physiowave, and PuraCath; reports receiving research funding from National Institute of Diabetes and Digestive and Kidney Diseases, and National Institute of Allergy and Infectious Diseases; reports being a scientific advisor or membership of the Board of Directors, Satellite Healthcare, and Co-Editor, Brenner & Rector's The Kidney (Elsevier); and reports other interests/relationships with the Data and Safety Monitoring Board service: Angion, Bayer, National Institute of Diabetes and Digestive and Kidney Diseases, and ReCor. W.F. Fearon reports having consultancy agreements with CathWorks, and Siemens; reports having an ownership interest in HeartFlow; and reports receiving research funding from Abbott Vascular, Boston Scientific, and Medtronic. X.S. Cheng reports receiving honoraria from ClarityCo and Medscape Education. All remaining authors have nothing to disclose., (Copyright © 2022 by the American Society of Nephrology.)
- Published
- 2021
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56. Healthcare information technology interventions to improve cardiovascular and diabetes medication adherence.
- Author
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Misono AS, Cutrona SL, Choudhry NK, Fischer MA, Stedman MR, Liberman JN, Brennan TA, Jain SH, and Shrank WH
- Subjects
- Antihypertensive Agents therapeutic use, Drug Utilization statistics & numerical data, Humans, Medical Informatics Applications, Randomized Controlled Trials as Topic, Cardiovascular Diseases drug therapy, Diabetes Mellitus drug therapy, Medication Adherence statistics & numerical data, Reminder Systems statistics & numerical data
- Abstract
Objective: To determine the efficacy of healthcare information technology (HIT) interventions in improving adherence., Study Design: Systematic search of randomized controlled trials of HIT interventions to improve medication adherence in cardiovascular disease or diabetes., Methods: Interventions were classified as 1-way patient reminder systems, 2-way interactive systems, and systems to enhance patient-provider interaction. Studies were subclassified into those with and without real-time provider feedback. Cohen's d effect sizes were calculated to assess each intervention's magnitude of effectiveness., Results: We identified 7190 articles, only 13 of which met inclusion criteria. The majority of included studies (54%, 7 studies) showed a very small ES. The effect size was small in 15%, large in 8%, and was not amenable to calculation in the remainder. Reminder systems were consistently effective, showing the largest effect sizes in this review. Education/counseling HIT systems were less successful, as was the addition of realtime adherence feedback to healthcare providers. Interactive systems were rudimentary and not integrated into electronic health records; they exhibited very small effect sizes. Studies aiming to improve patient-provider communication also had very small effect sizes., Conclusions: There is a paucity of data about HIT's efficacy in improving adherence to medications for cardiovascular disease and diabetes, although simple patient reminder systems appear effective. Future studies should focus on more sophisticated interactive interventions that expand the functionality and capabilities of HIT and better engage patients in care.
- Published
- 2010
57. Adherence to osteoporosis medications after patient and physician brief education: post hoc analysis of a randomized controlled trial.
- Author
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Shu AD, Stedman MR, Polinski JM, Jan SA, Patel M, Truppo C, Breiner L, Chen YY, Weiss TW, and Solomon DH
- Subjects
- Aged, Confidence Intervals, Female, Humans, Male, Middle Aged, Risk, Time Factors, United States, Bone Density Conservation Agents therapeutic use, Diphosphonates therapeutic use, Education, Medical, Continuing, Medication Adherence statistics & numerical data, Osteoporosis drug therapy, Patient Education as Topic
- Abstract
Objective: To examine whether adherence to osteoporosis medications can be improved by educational interventions targeted at primary care physicians (PCPs) and patients., Study Design: Post hoc analysis of data collected as part of a prospective randomized controlled trial to improve initiation of osteoporosis management such as bone mineral density testing or osteoporosis drug initiation., Methods: The trial was conducted among patients at risk for osteoporosis enrolled in Horizon Blue Cross Blue Shield of New Jersey. For a 3-month period, randomly selected PCPs and their patients received education about osteoporosis diagnosis and treatment. The PCPs received face-to-face education by trained pharmacists, while patients received letters and automated telephone calls. The control group received no education. We assessed medication adherence during 10 months following the start of the intervention using the medication possession ratio (MPR), the ratio of available medication to the total number of days studied., Results: These analyses included 1867 patients (972 randomized to the intervention group and 875 to the control group) and their 436 PCPs. During 10 months following the intervention, the median MPRs were 74% (interquartile range [IQR], 19%-93%) for the intervention group and 73% (IQR, 0%-93%) for the control group (P = .18). The median times until medication discontinuation after the intervention were 85 days (IQR, 58-174 days) for the intervention group and 79 days (IQR, 31-158 days) for the control group., Conclusion: The educational intervention did not significantly improve medication compliance or persistence with osteoporosis drugs.
- Published
- 2009
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