19 results on '"Balkenende E"'
Search Results
2. Patient care experience with utilization of isolation precautions: systematic literature review and meta-analysis
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Nair, R., Perencevich, E.N., Goto, M., Livorsi, D.J., Balkenende, E., Kiscaden, E., and Schweizer, M.L.
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- 2020
- Full Text
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3. A mother's gift of life: exploring the concerns and ethical aspects of fertility preservation for mother-to-daughter oocyte donation.
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Balkenende, E. M. E., Dondorp, W., Ploem, M. C., Lambalk, C. B., Goddijn, M., and Mol, F.
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REPRODUCTIVE technology , *FERTILITY , *OVUM donation , *PREMATURE ovarian failure , *ETHICS - Abstract
With the introduction of oocyte vitrification, a special form of intergenerational intrafamilial medically assisted reproduction (IMAR) has now become feasible: fertility preservation for mother-to-daughter oocyte donation (FPMDD). For girls diagnosed with premature ovarian insufficiency (POI), banking of their mothers' oocytes can preserve the option of having genetically related offspring. Since policy documents on IMAR do not discuss specific concerns raised by FPMDD, clinicians can feel at a loss for guidance with regard to handling these requests. Through a comparison of FPMDD with reproductive practices in which similar concerns were raised, proportionality of cryopreservation for self-use and pressure to use the oocytes in fertility preservation in minors, we argue that FPMDD can be acceptable under conditions. The paper ends with recommendations for handling FPMDD-requests, including different options for the legal construction of this form of oocyte donation. [ABSTRACT FROM AUTHOR]
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- 2017
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4. A prospective case series of women with estrogen receptor-positive breast cancer: levels of tamoxifen metabolites in controlled ovarian stimulation with high-dose tamoxifen
- Author
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Balkenende, E. M. E., primary, Dahhan, T., additional, Linn, S. C., additional, Jager, N. G. L., additional, Beijnen, J. H., additional, and Goddijn, M., additional
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- 2013
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5. [Oocyte vitrification: for whom?]
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Balkenende E, Dahhan T, Sjoerd Repping, Aa, Melker, van der Veen F, and Goddijn M
6. Tracking implementation strategies in real-world settings: VA Office of Rural Health enterprise-wide initiative portfolio.
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Reisinger HS, Barron S, Balkenende E, Steffen M, Steffensmeier K, Richards C, Ball D, Chasco EE, Van Tiem J, Johnson NL, Jones D, Friberg JE, Kenney R, Moeckli J, Arora K, and Rabin B
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- Humans, United States, Rural Health Services organization & administration, Rural Health, Diffusion of Innovation, Program Evaluation, United States Department of Veterans Affairs
- Abstract
Objective: To use a practical approach to examining the use of Expert Recommendations for Implementing Change (ERIC) strategies by Reach, Effectiveness, Adoption, Implementation, and Maintenance (RE-AIM) dimensions for rural health innovations using annual reports on a diverse array of initiatives., Data Sources and Study Setting: The Veterans Affairs (VA) Office of Rural Health (ORH) funds initiatives designed to support the implementation and spread of innovations and evidence-based programs and practices to improve the health of rural Veterans. This study draws on the annual evaluation reports submitted for fiscal years 2020-2022 from 30 of these enterprise-wide initiatives (EWIs)., Study Design: Content analysis was guided by the RE-AIM framework conducted by the Center for the Evaluation of Enterprise-Wide Initiatives (CEEWI), a Quality Enhancement Research Initiative (QUERI)-ORH partnered evaluation initiative., Data Collection and Extraction Methods: CEEWI analysts conducted a content analysis of EWI annual evaluation reports submitted to ORH. Analysis included cataloguing reported implementation strategies by Reach, Adoption, Implementation, and Maintenance (RE-AIM) dimensions (i.e., identifying strategies that were used to support each dimension) and labeling strategies using ERIC taxonomy. Descriptive statistics were conducted to summarize data., Principal Findings: A total of 875 implementation strategies were catalogued in 73 reports. Across these strategies, 66 unique ERIC strategies were reported. EWIs applied an average of 12 implementation strategies (range 3-22). The top three ERIC clusters across all 3 years were Develop stakeholder relationships (21%), Use evaluative/iterative strategies (20%), and Train/educate stakeholders (19%). Most strategies were reported within the Implementation dimension. Strategy use among EWIs meeting the rurality benchmark were also compared., Conclusions: Combining the dimensions from the RE-AIM framework and the ERIC strategies allows for understanding the use of implementation strategies across each RE-AIM dimension. This analysis will support ORH efforts to spread and sustain rural health innovations and evidence-based programs and practices through targeted implementation strategies., (Published 2024. This article is a U.S. Government work and is in the public domain in the USA. Health Services Research published by Wiley Periodicals LLC on behalf of Health Research and Educational Trust.)
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- 2024
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7. Gaps in communication theory paradigms when conducting implementation science research: qualitative observations from interviews with administrators, implementors, and evaluators of rural health programs.
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Johnson NL, Van Tiem J, Balkenende E, Jones D, Friberg JE, Chasco EE, Moeckli J, Steffensmeier KS, Steffen MJA, Arora K, Rabin BA, and Reisinger HS
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- Humans, Interviews as Topic, Rural Health Services organization & administration, Cooperative Behavior, United States, Administrative Personnel, United States Department of Veterans Affairs organization & administration, Rural Health, Communication, Implementation Science, Qualitative Research, Leadership
- Abstract
Background: Communication is considered an inherent element of nearly every implementation strategy. Often it is seen as a means for imparting new information between stakeholders, representing a Transaction orientation to communication. From a Process orientation, communication is more than information-exchange and is acknowledged as being shaped by (and shaping) the individuals involved and their relationships with one another. As the field of Implementation Science (IS) works to strengthen theoretical integration, we encourage an interdisciplinary approach that engages communication theory to develop richer understanding of strategies and determinants of practice., Methods: We interviewed 28 evaluators, 12 implementors, and 12 administrators from 21 Enterprise-Wide Initiatives funded by the Department of Veteran Affairs Office of Rural Health. Semi-structured interviews focused on experiences with implementation and evaluation strategies. We analyzed the interviews using thematic analysis identifying a range of IS constructs. Then we deductively classified those segments based on a Transaction or Process orientation to communication., Results: We organized findings using the two IS constructs most commonly discussed in interviews: Collaboration and Leadership Buy-in. The majority of segments coded as Collaboration (n = 34, 74%) and Leadership Buy-in (n = 31, 70%) discussed communication from a Transaction orientation and referred to communication as synonymous with information exchange, which emphasizes the task over the relationships between the individuals performing the tasks. Conversely, when participants discussed Collaboration and Leadership Buy-in from a Process orientation, they acknowledged both constructs as the result of long-term efforts to develop positive relationships based on trust and respect, and emphasized the time costliness of such strategies. Our findings demonstrate that participants who discussed communication from a Process orientation recognized the nuance and complexity of interpersonal interactions, particularly in the context of IS., Conclusions: Efficient, reliable information exchange is a critical but often overemphasized element of implementation. Practitioners and researchers must recognize and incorporate the larger role of communication in IS. Two suggestions for engaging a Process orientation to communication are to: (a) use interview probes to learn how communication is enacted, and (b) use process-oriented communication theories to develop interventions and evaluation tools., (© 2024. This is a U.S. Government work and not under copyright protection in the US; foreign copyright protection may apply.)
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- 2024
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8. Improving shared decision-making around antimicrobial-prescribing during the end-of-life period: a qualitative study of Veterans, their support caregivers and their providers.
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Goedken CC, Balkenende E, Livorsi D, Giannitrapani K, McCaa M, Clore G, Goto M, Marra AR, and Perencevich EN
- Abstract
Objective: Antimicrobials are frequently used for palliation during end-of-life care, but adverse effects, such as antimicrobial resistance, are a concern. Shared decision-making is beneficial in end-of-life care conversations to help align antimicrobial-prescribing with patient preferences. However, there is limited data regarding optimal incorporation of antimicrobial-prescribing discussions into shared decision-making conversations. We explored healthcare provider, patient, and support caregiver (eg, family member/friend) perceptions of barriers and facilitators to discussing antimicrobial-prescribing during the end-of-life period., Design: Qualitative study., Participants: Healthcare providers; palliative care/hospice care patients/caregivers., Methods: We conducted semi-structured interviews on shared attitudes/beliefs about antimicrobial-prescribing during end-of-life patient care at one acute-care and one long-term-care facility. Interviews were analyzed for thematic content., Results: Fifteen providers and 13 patients/caregivers completed interviews. Providers recognized the potential benefit of leveraging shared decision-making to guide antimicrobial-prescribing decisions. Barriers included limited face-to-face time with the patient and uncertainty of end-of-life prognosis. Patients/caregivers cited trust, comprehension, and feeling heard as important characteristics which act as facilitators in fostering effective shared decision-making around antimicrobial use. Communication in which providers ensure patients are involved in shared decision-making discussions could be increased to ensure patients and their providers develop a mutually agreeable care plan., Conclusions: Shared decision-making is a practice that can guide antimicrobial-prescribing decisions during end-of-life care, thus potentially minimizing antimicrobial-related adverse effects. Our findings highlight opportunities for increased shared decision-making around antimicrobial use during end-of-life care. Interventions designed to address the identified barriers to shared decision-making have the potential to improve antimicrobial-prescribing practices at end-of-life., Competing Interests: All authors declare that there is no competing of interests with respect to the research, authorship, and/or publication of this article., (© The Author(s) 2024.)
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- 2024
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9. RE-AIM for rural health innovations: perceptions of (mis) alignment between the RE-AIM framework and evaluation reporting in the Department of Veterans Affairs Enterprise-Wide Initiatives program.
- Author
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Chasco EE, Van Tiem J, Johnson N, Balkenende E, Steffen M, Jones D, Friberg JE, Steffensmeier K, Moeckli J, Arora K, Rabin BA, and Reisinger HS
- Abstract
Background: The Department of Veterans Affairs (VA) Office of Rural Health (ORH) supports national VA program offices' efforts to expand health care to rural Veterans through its Enterprise-Wide Initiatives (EWIs) program. In 2017, ORH selected Reach, Effectiveness, Adoption, Implementation, and Maintenance (RE-AIM), an implementation science framework, to structure the EWI evaluation and reporting process. As part of its mandate to improve EWI program evaluation, the Center for the Evaluation of Enterprise-Wide Initiatives conducted a qualitative evaluation to better understand EWI team' perceptions of, and barriers and facilitators to, the EWI evaluation process., Methods: We conducted 43 semi-structured interviews with 48 team members (e.g., evaluators, program office leads, and field-based leads) representing 21 EWIs from April-December 2020. Questions focused on participants' experiences using strategies targeting each RE-AIM dimension. Interviews were inductively analyzed in MAXQDA. We also systematically reviewed 51 FY19-FY20 EWI annual reports to identify trends in misapplications of RE-AIM., Results: Participants had differing levels of experience with RE-AIM. While participants understood ORH's rationale for selecting a common framework to structure evaluations, the perceived misalignment between RE-AIM and EWIs' work emerged as an important theme. Concerns centered around 3 sub-themes: (1) (Mis)Alignment with RE-AIM Dimensions , (2) (Mis)Alignment between RE-AIM and the EWI , and (3) (Mis)Alignment with RE-AIM vs. other Theories, Models, or Frameworks . Participants described challenges differentiating between and operationalizing dimensions in unique contexts. Participants also had misconceptions about RE-AIM and its relevance to their work, e.g., that it was meant for established programs and did not capture aspects of initiative planning, adaptations, or sustainability. Less commonly, participants shared alternative models or frameworks to RE-AIM. Despite criticisms, many participants found RE-AIM useful, cited training as important to understanding its application, and identified additional training as a future need., Discussion: The selection of a shared implementation science framework can be beneficial, but also challenging when applied to diverse initiatives or contexts. Our findings suggest that establishing a common understanding, operationalizing framework dimensions for specific programs, and assessing training needs may better equip partners to integrate a shared framework into their evaluations., Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest., (© 2024 Chasco, Van Tiem, Johnson, Balkenende, Steffen, Jones, Friberg, Steffensmeier, Moeckli, Arora, Rabin and Reisinger.)
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- 2024
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10. Association of entry into hospice or palliative care consultation during acute care hospitalization with subsequent antibiotic utilization.
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Marra AR, Clore GS, Balkenende E, Goedken CC, Livorsi DJ, Goto M, Vaughan-Sarrazin MS, Broderick A, and Perencevich EN
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- Humans, Retrospective Studies, Hospitalization, Referral and Consultation, Palliative Care, Hospices
- Abstract
Objective: We aimed to estimate antibiotic use during the last 6 months of life for hospitalized patients under hospice or palliative care and identify potential targets (i.e. time points) for antibiotic stewardship during the end-of-life period., Methods: We conducted a retrospective cohort study of nationwide Veterans Affairs (VA) patients who died between January 1, 2014 and December 31, 2019 and who had been hospitalized within 6 months prior to death. Data from the VA's integrated electronic medical record were collected, including demographics, comorbid conditions, and duration of inpatient antibiotics administered, along with outpatient antibiotics dispensed. A propensity score-matched cohort analysis was conducted to compare antibiotic use between hospitalized patients placed into palliative care or hospice matched to hospitalized patients not receiving palliative care or hospice., Results: There were 9808 and 40 796 propensity score-matched patient pairs in the hospice and palliative care groups, respectively. Within 14 days of placement or consultation, 41% (4040/9808) of hospice patients and 48% (19 735/40 796) of palliative care patients received at least one antibiotic, while 25% (2420/9808) matched nonhospice and 27% (10 991/40 796) matched nonpalliative care patients received antibiotics. Entry into hospice was independently associated with a 12% absolute increase in antibiotic prescribing, and entry into palliative care was associated with a 17% absolute increase during the 14 days post-entry vs. pre-entry period., Discussion: We observed that patients receiving end-of-life care had high levels of antibiotic exposure across this VA population, particularly during admissions when they received hospice or palliative care consultation., (Copyright © 2022 European Society of Clinical Microbiology and Infectious Diseases. All rights reserved.)
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- 2023
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11. "Our job is to break that chain of infection": Challenges environmental management services (EMS) staff face in accomplishing their critical role in infection prevention.
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Goedken CC, McKinley L, Balkenende E, Hockett Sherlock S, Knobloch MJ, Perencevich EN, Safdar N, and Reisinger HS
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Objectives: Contaminated surfaces in healthcare settings contribute to the transmission of nosocomial pathogens. Adequate environmental cleaning is important for preventing the transmission of important pathogens and reducing healthcare-associated infections. However, effective cleaning practices vary considerably. We examined environmental management services (EMS) staff experiences and perceptions surrounding environmental cleaning to describe perceived challenges and ideas to promote an effective environmental services program., Design: Qualitative study., Participants: Frontline EMS staff., Methods: From January to June 2019, we conducted individual semistructured interviews with key stakeholders (ie, EMS staff) at 3 facilities within the Veterans' Affairs Healthcare System. We used the Systems Engineering Initiative for Patient Safety (SEIPS) framework (ie, people, environment, organization, tasks, tools) to guide this study. Interviews were audio-recorded, transcribed, and analyzed for thematic content., Results: In total, 13 EMS staff and supervisors were interviewed. A predominant theme that emerged were the challenges EMS staff saw as hindering their ability to be effective at their jobs. EMS staff interviewed felt they understand their job requirements and are dedicated to their work; however, they described challenges related to feeling undervalued and staffing issues., Conclusions: EMS staff play a critical role in infection prevention in healthcare settings. However, some do not believe their role is recognized or valued by the larger healthcare team and leadership. EMS staff provided ideas for improving feelings of value and job satisfaction, including higher pay, opportunities for certifications and advancement, as well as collaboration or integration with the larger healthcare team. Healthcare organizations should focus on utilizing these suggestions to improve the EMS work climate., (© The Author(s) 2022.)
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- 2022
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12. Investigation of factors influencing inpatient antibiotic prescribing decisions in the Veterans' Health Administration.
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Economos ET, Goedken CC, Sherlock SH, Suda KJ, Goetz M, Balkenende E, Chasco EE, Scherer AM, Goto M, Perencevich EN, Schacht Reisinger H, and Livorsi DJ
- Abstract
To investigate factors that influence antibiotic prescribing decisions, we interviewed 49 antibiotic stewardship champions and stakeholders across 15 hospitals. We conducted thematic analysis and subcoding of decisional factors. We identified 31 factors that influence antibiotic prescribing decisions. These factors may help stewardship programs identify educational targets and design more effective interventions., (© The Author(s) 2022.)
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- 2022
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13. The feasibility of implementing antibiotic restrictions for fluoroquinolones and cephalosporins: a mixed-methods study across 15 Veterans Health Administration hospitals.
- Author
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Livorsi DJ, Suda KJ, Cunningham Goedken C, Hockett Sherlock S, Balkenende E, Chasco EE, Scherer AM, Goto M, Perencevich EN, Goetz MB, and Reisinger HS
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- Anti-Bacterial Agents therapeutic use, Feasibility Studies, Hospitals, Humans, Veterans Health, Cephalosporins, Fluoroquinolones
- Abstract
Introduction: The optimal method for implementing hospital-level restrictions for antibiotics that carry a high risk of Clostridioides difficile infection has not been identified. We aimed to explore barriers and facilitators to implementing restrictions for fluoroquinolones and third/fourth-generation cephalosporins., Methods: This mixed-methods study across a purposeful sample of 15 acute-care, geographically dispersed Veterans Health Administration hospitals included electronic surveys and semi-structured interviews (September 2018 to May 2019). Surveys on stewardship strategies were administered at each hospital and summarized with descriptive statistics. Interviews were performed with 30 antibiotic stewardship programme (ASP) champions across all 15 sites and 19 additional stakeholders at a subset of 5 sites; transcripts were analysed using thematic content analysis., Results: The most restricted agent was moxifloxacin, which was restricted at 12 (80%) sites. None of the 15 hospitals restricted ceftriaxone. Interviews identified differing opinions on the feasibility of restricting third/fourth-generation cephalosporins and fluoroquinolones. Some participants felt that restrictions could be implemented in a way that was not burdensome to clinicians and did not interfere with timely antibiotic administration. Others expressed concerns about restricting these agents, particularly through prior approval, given their frequent use, the difficulty of enforcing restrictions and potential unintended consequences of steering clinicians towards non-restricted antibiotics. A variety of stewardship strategies were perceived to be effective at reducing the use of these agents., Conclusions: Across 15 hospitals, there were differing opinions on the feasibility of implementing antibiotic restrictions for third/fourth-generation cephalosporins and fluoroquinolones. While the perceived barrier to implementing restrictions was frequently high, many hospitals were effectively using restrictions and reported few barriers to their use., (Published by Oxford University Press on behalf of the British Society for Antimicrobial Chemotherapy 2021. This work is written by (a) US Government employee(s) and is in the public domain in the US.)
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- 2021
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14. Antibiotic use during end-of-life care: A systematic literature review and meta-analysis.
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Marra AR, Puig-Asensio M, Balkenende E, Livorsi DJ, Goto M, and Perencevich EN
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- Anti-Bacterial Agents therapeutic use, Humans, Palliative Care, Referral and Consultation, Neoplasms drug therapy, Terminal Care
- Abstract
Background: We performed a systematic literature review and meta-analysis measuring the burden of antibiotic use during end-of-life (EOL) care., Methods: We searched PubMed, CINAHL (EBSCO platform), and Embase (Elsevier platform), through July 2019 for studies with the following inclusion criteria in the initial analysis: antibiotic use in the EOL care patients (advanced dementia, cancer, organ failure, frailty or multi-morbidity). If the number of patients in palliative care consultation (PCC) was available, antibiotic use data were pooled to compare the proportion of patients who received antibiotics under PCC compared to those not receiving PCC. Random-effect models were used to obtain pooled mean differences, and heterogeneity was assessed using the I2 value., Results: Overall, 72 studies met the inclusion criteria and were included in the final review: 22 EOL studies included only patients with cancer; 17 studies included only patients with advanced dementia; and 33 studies included "mixed populations" of EOL patients. Although few studies reported antibiotic using standard metrics (eg, days of therapy), 48 of 72 studies (66.7%) reported antibiotic use in >50% of all patients. When the 3 studies that evaluated antibiotic use in PCC were pooled together, patients under PCC was more likely to receive antibiotics compared to patients not under PCC (pooled odds ratio, 1.73; 95% CI, 1.02-2.93)., Conclusions: Future studies are needed to evaluate the benefits and harms of using antibiotics for patients during EOL care in diverse patient populations.
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- 2021
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15. Incidence and Outcomes Associated With Clostridium difficile Infections: A Systematic Review and Meta-analysis.
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Marra AR, Perencevich EN, Nelson RE, Samore M, Khader K, Chiang HY, Chorazy ML, Herwaldt LA, Diekema DJ, Kuxhausen MF, Blevins A, Ward MA, McDanel JS, Nair R, Balkenende E, and Schweizer ML
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- Humans, Incidence, Outcome Assessment, Health Care statistics & numerical data, Propensity Score, United States epidemiology, Clostridium Infections epidemiology, Cross Infection epidemiology, Length of Stay statistics & numerical data
- Abstract
Importance: An understanding of the incidence and outcomes of Clostridium difficile infection (CDI) in the United States can inform investments in prevention and treatment interventions., Objective: To quantify the incidence of CDI and its associated hospital length of stay (LOS) in the United States using a systematic literature review and meta-analysis., Data Sources: MEDLINE via Ovid, Cochrane Library Databases via Wiley, Cumulative Index of Nursing and Allied Health Complete via EBSCO Information Services, Scopus, and Web of Science were searched for studies published in the United States between 2000 and 2019 that evaluated CDI and its associated LOS., Study Selection: Incidence data were collected only from multicenter studies that had at least 5 sites. The LOS studies were included only if they assessed postinfection LOS or used methods accounting for time to infection using a multistate model or compared propensity score-matched patients with CDI with control patients without CDI. Long-term-care facility studies were excluded. Of the 119 full-text articles, 86 studies (72.3%) met the selection criteria., Data Extraction and Synthesis: Two independent reviewers performed the data abstraction and quality assessment. Incidence data were pooled only when the denominators used the same units (eg, patient-days). These data were pooled by summing the number of hospital-onset CDI incident cases and the denominators across studies. Random-effects models were used to obtain pooled mean differences. Heterogeneity was assessed using the I2 value. Data analysis was performed in February 2019., Main Outcomes and Measures: Incidence of CDI and CDI-associated hospital LOS in the United States., Results: When the 13 studies that evaluated incidence data in patient-days due to hospital-onset CDI were pooled, the CDI incidence rate was 8.3 cases per 10 000 patient-days. Among propensity score-matched studies (16 of 20 studies), the CDI-associated mean difference in LOS (in days) between patients with and without CDI varied from 3.0 days (95% CI, 1.44-4.63 days) to 21.6 days (95% CI, 19.29-23.90 days)., Conclusions and Relevance: Pooled estimates from currently available literature suggest that CDI is associated with a large burden on the health care system. However, these estimates should be interpreted with caution because higher-quality studies should be completed to guide future evaluations of CDI prevention and treatment interventions.
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- 2020
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16. Stimulation of the ovaries in women with breast cancer undergoing fertility preservation: Alternative versus standard stimulation protocols; the study protocol of the STIM-trial.
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Dahhan T, Balkenende EME, Beerendonk CCM, Fleischer K, Stoop D, Bos AME, Lambalk CB, Schats R, van Golde RJT, Schipper I, Louwé LA, Cantineau AEP, Smeenk JMJ, de Bruin JP, Reddy N, Kopeika Y, van der Veen F, van Wely M, Linn SC, and Goddijn M
- Subjects
- Adolescent, Adult, Age Factors, Antineoplastic Agents administration & dosage, Body Mass Index, Estrogens blood, Female, Follicle Stimulating Hormone administration & dosage, Humans, Letrozole, Nitriles therapeutic use, Oocytes, Research Design, Socioeconomic Factors, Tamoxifen therapeutic use, Triazoles therapeutic use, Young Adult, Antineoplastic Agents therapeutic use, Breast Neoplasms drug therapy, Fertility Preservation methods, Follicle Stimulating Hormone therapeutic use, Ovulation Induction methods
- Abstract
Background: Chemotherapy for breast cancer may have a negative impact on reproductive function due to gonadotoxicity. Fertility preservation via banking of oocytes or embryos after ovarian stimulation with FSH can increase the likelihood of a future live birth. It has been hypothesized that elevated serum estrogen levels during ovarian stimulation may induce breast tumour growth. This has led to the use of alternative stimulation protocols with addition of tamoxifen or letrozole. The effectiveness of these stimulation protocols in terms of oocyte yield is unknown., Methods/design: Randomized open-label trial comparing ovarian stimulation plus tamoxifen and ovarian stimulation plus letrozole with standard ovarian stimulation in the course of fertility preservation. The study population consists of women with breast cancer who opt for banking of oocytes or embryos, aged 18-43years at randomisation. Primary outcome is the number of oocytes retrieved at follicle aspiration. Secondary outcomes are number of mature oocytes retrieved, number of oocytes or embryos banked and peak E2 levels during ovarian stimulation., Discussion: Concerning the lack of evidence on which stimulation protocol should be used in women with breast cancer and the growing demand for fertility preservation, there is an urgent need to undertake this study. By performing this study, we will be able to closely monitor the effects of various stimulation protocols in women with breast cancer and pave the way for long term follow up on the safety of this procedure in terms of breast cancer prognosis., Trial Registration: NTR4108., (Copyright © 2017 Elsevier Inc. All rights reserved.)
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- 2017
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17. [Oocyte vitrification: for whom?].
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Balkenende E, Dahhan T, Repping S, de Melker AA, van der Veen F, and Goddijn M
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- Adult, Age Factors, Cost-Benefit Analysis, Cross-Sectional Studies, Female, Humans, Ovulation Induction, Risk Assessment, Vitrification, Cryopreservation methods, Fertility physiology, Oocytes growth & development
- Abstract
Objective: To study the indications of oocyte vitrification in women who undergo this intervention., Design: Cross-sectional study., Method: We collected the indications of oocyte vitrification in women who underwent, or started ovarian stimulation for, this intervention between May 2006 and December 31st 2013. Indications were subcategorized into six groups: no sperm available during IVF or ICSI treatment, planned gonadotoxic therapy, ovarian surgery, risk on premature ovarian insufficiency , previous gonadotoxic therapy, and anticipated gamete exhaustion., Results: During the study period 298 women vitrified oocytes or started with ovarian stimulation for oocyte vitrification. The majority of the women (33%) vitrified oocytes because of anticipated gamete exhaustion. Planned gonadotoxic treatment was for 81 women (27%) the reason for oocyte vitrification., Conclusion: With oocyte vitrification women are able to extend the time at which they can conceive. The future will tell whether the benefits of oocyte vitrification outweigh the risks and costs.
- Published
- 2015
18. Tamoxifen or letrozole versus standard methods for women with estrogen-receptor positive breast cancer undergoing oocyte or embryo cryopreservation in assisted reproduction.
- Author
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Dahhan T, Balkenende E, van Wely M, Linn S, and Goddijn M
- Subjects
- Breast Neoplasms metabolism, Female, Humans, Letrozole, Pregnancy, Receptors, Estrogen metabolism, Reproductive Techniques, Assisted, Breast Neoplasms drug therapy, Cryopreservation, Embryo, Mammalian, Nitriles therapeutic use, Oocytes, Selective Estrogen Receptor Modulators therapeutic use, Tamoxifen therapeutic use, Triazoles therapeutic use
- Abstract
Background: Cryopreservation of oocytes or embryos preceded by controlled ovarian stimulation (COS) can increase the chance of future pregnancy in women with breast cancer who risk therapy-induced ovarian failure. In women with estrogen-receptor (ER) positive breast cancer, alternative COS protocols with tamoxifen or letrozole are being used to theoretically inhibit breast cancer growth during COS., Objectives: To assess the effects of tamoxifen or letrozole, in addition to standard COS protocols, on the breast cancer-free interval in premenopausal women with ER positive breast cancer who undergo COS for embryo or oocyte cryopreservation., Search Methods: We searched the Ovid Cochrane Central Register of Controlled Trials (CENTRAL), Ovid MEDLINE, Ovid EMBASE, Ovid PsycINFO, and EBSCOhost CINAHL. We applied no limitations in year of publication or language. In addition, we searched trial registers for ongoing and registered trials, conference abstracts, and sources of grey literature. The search was conducted in January 2013., Selection Criteria: Randomised trials comparing different COS protocols in women with breast cancer were eligible for inclusion., Data Collection and Analysis: Two review authors independently scanned the titles, abstracts, or both sections according to Cochrane guidelines. If data to include were provided, data extraction would have been independently performed by two review authors by using forms designed according to Cochrane guidelines., Main Results: No randomised controlled trials were found that met the inclusion criteria., Authors' Conclusions: COS schedules with the additional use of tamoxifen or letrozole are commonly chosen as an alternative regimen in young women with ER positive breast cancer who undergo COS for oocyte or embryo cryopreservation. No randomised controlled trials support the idea that these alternative COS schedules are superior to standard COS.
- Published
- 2013
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19. Comment on GnRH analogue cotreatment with chemotherapy for preservation of ovarian function.
- Author
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Balkenende E, Dahhan T, van der Veen F, and Goddijn M
- Subjects
- Female, Humans, Pregnancy, Antineoplastic Agents adverse effects, Gonadotropin-Releasing Hormone administration & dosage, Neoplasms drug therapy, Primary Ovarian Insufficiency chemically induced, Primary Ovarian Insufficiency prevention & control
- Published
- 2011
- Full Text
- View/download PDF
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