
Jason Fletcher
PhD
Senior Biostatistician
Director, Biostatistical Core
jason.fletcher@nyu.edu
1 212 998 5401
Senior Biostatistician
Director, Biostatistical Core
433 First Ave
New York, NY 10010
United States
Jason Fletcher's additional information
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Jason Fletcher, PhD, is a senior biostatistician at NYU Rory Meyers College of Nursing. He has more than 15 years of experience conducting evaluation research in the fields of community and public health. His methodological interests include item-response theory, differential item analysis, multilevel modeling, and analysis of longitudinal data. His substantive interests include health disparities and chronic disease.
Fletcher received his PhD in psychometrics from Fordham University, MS in quantitative research methods from Southern Connecticut State University, and MA in psychometrics from Fordham University.
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PhD, Psychometrics - Fordham University (2008)MS, Quantitative Research Methods - Southern Connecticut State University (2004)MA, Psychometrics - Fordham University (2000)BA, Psychology - Western Connecticut State University (1997)
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American Statistical Association
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Publications
Limb Volume Changes and Activities of Daily Living: A Prospective Study
AbstractFletcher, J., Park, J. H., Merriman, J., Brody, A., Fletcher, J., Yu, G., Ko, E., Yancey, A., & Fu, M. R. (2021). (Vols. 19, Issues 3, pp. 261-268).AbstractBreast cancer-related lymphedema (BCRL) limits the movements of patients' limbs, which leads to a diminished ability to achieve essential activities of daily living (ADLs). The purpose of this study was to examine the associations between limb volume changes from the baseline before breast cancer surgery and self-reported difficulty in performing ADLs at 12 months following cancer surgery. We hypothesized that a positive association existed between limb volume changes from the baseline and self-reported difficulty in performing ADLs at 12 months following breast cancer surgery. The data of the present study were part of a larger study with 140 breast cancer patients recruited before breast cancer surgery and followed up during their first year of treatment. Patients with more than 10% limb volume increase reported more frequent distress in performing 13 ADL items, compared with patients whose limb volume increased by 5%-10%. Regression analysis showed a significant increase in the odds ratio of reporting difficulty in ADLs compared with the group with less than 5% limb volume increase. Overall, patients with a greater limb volume increase underwent more difficulty performing ADLs. Patients reported more difficulty in performing ADLs even with 5%-10% limb volume increase. Currently, there is no standardized guideline to diagnose BCRL, although previous evidence suggests a limb volume increase greater than 10% as a criterion for BCRL. The findings from the present study suggest a more precise and clinically meaningful criteria for diagnosing BCRL to accommodate those with 5%-10% increase in limb volume.Methodological Analysis: Randomized Controlled Trials for Pfizer and Moderna COVID-19 Vaccines
AbstractFletcher, J., Hallas, D., Spratling, R., & Fletcher, J. (2021). (Vols. 35, Issues 4, pp. 443-448).AbstractCritical appraisal of randomized controlled trials (RCTs) determines rigor, quality, and whether the findings are applicable to the populations served in clinical practices. The authors conducted a rigorous analysis using the RCT Critical Appraisal Skills Programme (CASP) Checklist for the two RCTs Pfizer (New York, NY) and Moderna (Cambridge, MA) conducted and the reporting of these RCTs using the Consolidated Standards of Reporting Trials checklist. The goals for this analysis were twofold: (1) enable health care providers to understand the methods and outcomes of these RCTs, and (2) enable health care providers and community leaders to become champions for the vaccines to reduce vaccine hesitancy among all populations. The analysis is presented using each of the 11 questions on the CASP tool while comparing the methodology and results for each vaccine. Most CASP tool items were positive or yes for both the Pfizer and Moderna RCTs. Items that were not scored as yes are discussed. The analysis outcomes revealed that both RCTs were rigorously conducted and provide an assurance to all health care providers and the public of the safety and efficacy of both vaccines to impact the astounding morbidity and mortality of COVID-19 disease. The authors believed that the analysis was an essential component of the distribution process to develop plans and communication strategies to reduce potential vaccine hesitancy and resistance.Protocol for an embedded pragmatic clinical trial to test the effectiveness of Aliviado Dementia Care in improving quality of life for persons living with dementia and their informal caregivers
AbstractFletcher, J., Bristol, A. A. A., Convery, K. A., Sotelo, V., Schneider, C. E., Lin, S.- Y., Fletcher, J., Rupper, R., Galvin, J. E., & Brody, A. A. A. (2020). (Vols. 93, p. 106005).AbstractPersons living with Alzheimer's disease and related dementias (ADRD) frequently experience pain and behavioral and psychological symptoms of dementia (BPSD) which decrease quality of life (QOL) and influence caregiver burden. Home healthcare professionals however may underrecognize or lack the ability to manage BPSD.Relevance of Sex and Subtype in Patients With IBS: An Exploratory Study of Gene Expression
AbstractFletcher, J., Weaver, K. R., Melkus, G. D., Fletcher, J., & Henderson, W. A. (2020). (Vols. 22, Issue 1, pp. 13-23).AbstractPsychological state, stress level, and gastrointestinal function are intricately related and relevant to symptom exacerbation in patients with irritable bowel syndrome (IBS), but genetic contributors to this brain-gut connection are not fully understood. The purpose of this exploratory study was to compare gene expression in participants with IBS to that of healthy controls (HC) and to examine patterns of expression in participants with IBS by sex and IBS subtype.A comparison of scheduling, work hours, overtime, and work preferences across four cohorts of newly licensed Registered Nurses
AbstractFletcher, J., Stimpfel, A. W., Fletcher, J., & Kovner, C. T. (2019). (Vols. 75, Issues 9, pp. 1902-1910).AbstractTo conduct a comparative analysis of four cohorts of newly licensed Registered Nurses and their work schedule, daily shift length, weekly work hours, second job, and weekly overtime hours. Nurses also reported their preferences regarding work schedule and daily shift length.Traditional and Nontraditional Collaborations to Improve Population Health Using Geospatial Information SystemMaps: Analysis of the Opioid Crisis
AbstractFletcher, J., Hallas, D., Klar, R. T., Baldyga, J. A., Rattner, I., Waingortin, R., & Fletcher, J. (2019). (Vols. 33, Issues 3, pp. 309-322).AbstractThe study aims were to analyze interprofessional practice collaborations among traditional and nontraditional health care providers and to educate nurse practitioner preceptors and students on population health, specifically, implementation of geospatial information system (GIS) maps and the correlation with the opioid crisis.Diversity and education of the nursing workforce 2006-2016
AbstractFletcher, J., Kovner, C. T., Djukic, M., Jun, J., Fletcher, J., Fatehi, F. K., & Brewer, C. S. (2018). (Vols. 66, Issues 2, pp. 160-167).AbstractThe Institute of Medicine (IOM) report, The Future of Nursing, included recommendations to increase nurse diversity, the percent of nurses obtaining a bachelor's degree, and inter-professional education.Perceived Stress, Its Physiological Correlates, and Quality of Life in Patients With Irritable Bowel Syndrome
AbstractFletcher, J., Weaver, K. R., Melkus, G. D., Fletcher, J., & Henderson, W. A. (2018). (Vols. 20, Issues 3, pp. 312-320).AbstractIrritable bowel syndrome (IBS) is a chronic, common disorder of the gastrointestinal tract associated with high psychological comorbidity and diminished quality of life. Patients with IBS display a heightened sensitivity to stress, although the literature is inconsistent as to whether they have a dysregulated stress response. The purpose of the present investigation, a substudy of a larger research effort, was to examine physiological correlates of perceived stress in patients with IBS (cortisol and adrenocorticotropic hormone) and to explore associations between perceived stress and quality of life. A total of 101 participants (35 with IBS [predominant subtypes IBS-constipation and IBS-diarrhea] and 66 healthy controls [HCs]) completed self-report inventories regarding perceived stress and quality of life, and fasting peripheral blood was drawn. Participants with IBS did not differ from the HC in demographic or physiological measures but did differ in psychological measures, reporting significantly higher levels of perceived stress and lower levels of quality of life. Perceived stress and quality of life were not significantly associated in IBS participants. However, differential findings of the stress response were found within IBS participants by sex, race, and subtype. These findings illustrate the heterogeneity of the IBS patient population, underscore the necessity of evaluating larger sample sizes and increasing the diversity of such samples to include males and ethnic minorities, and demonstrate the importance of taking an individualized approach to evaluation and treatment in the IBS patient population.Serum Proteomics in African American Female Patients With Irritable Bowel Syndrome: An Exploratory Study
AbstractFletcher, J., Weaver, K. R., Melkus, G. D. E., Fletcher, J., & Henderson, W. A. (2018). (Vols. 67, Issues 3, pp. 261-267).AbstractSex and subtype differences within patients with irritable bowel syndrome (IBS) complicate the understanding of disorder pathogenesis and hinder the design of efficacious, therapeutic interventions.Cardiovascular Health in Black and Latino Adults With Type 2 Diabetes
AbstractFletcher, J., McCarthy, M. M., Del Giudice, I., Wong, A., Fletcher, J., Dickson, V. V. V., & D’Eramo Melkus, G. (Vols. 73, Issues 4, pp. 270-277).AbstractThe incidence of type 2 diabetes (T2DM) among U.S. adults has been rising annually, with a higher incidence rate in Black and Hispanic adults than in Whites. The American Heart Association (AHA) has defined cardiovascular health according to the achievement of seven health behaviors (smoking, body mass index [BMI], physical activity, diet) and health factors (total cholesterol, blood pressure, fasting glucose). Optimal cardiovascular health has been associated with a lower risk of cardiovascular disease, and awareness of this risk may influence healthy behaviors.