ArticleJournal of comparative effectiveness research2015
Revisiting the washout period in the incident user study design: why 6-12 months may not be sufficient.
Article in Journal of comparative effectiveness research, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.
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Who cites it
31 citing papers in PubMed.
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- Comparative Risk of Hyponatremia Among Patients Treated With Second-Generation Antipsychotics.JAMA network open · 2026Article
- Low levels of low-density lipoprotein cholesterol in older adults are inversely associated with the incidence of coronary artery disease and all-cause mortality: the Shizuoka Kokuho Database study.European geriatric medicine · 2026Article
- Article
- Association between sedative prescriptions after hospital discharge and falls and other adverse events in older adults: a population-based cohort study.CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne · 2026Article
- Impact of study design decisions on identification of treatment initiators of medications for opioid use disorder.Addiction (Abingdon, England) · 2026Article
- Estimating the incidence of actionable drug-gene interactions in Japanese patients with major depressive disorder.Frontiers in psychiatry · 2025Article
- Article
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- New cases of dementia are rising in elderly populations in Wales, UK.Journal of the neurological sciences · 2023Article
- Examining Real-World Adherence to Nusinersen for the Treatment of Spinal Muscular Atrophy Using Two Large US Data Sources.Advances in therapy · 2023Article
- Novel Algorithm for the Estimation of Cancer Incidence Using Claims Data in Japan: A Feasibility Study.JCO global oncology · 2023Article
- Pharmacoepidemiological Research on N-Nitrosodimethylamine-Contaminated Ranitidine Use and Long-Term Cancer Risk: A Population-Based Longitudinal Cohort Study.International journal of environmental research and public health · 2022Observational
- Incidence in pharmacoepidemiology-Basic definitions and types of misclassification.Basic & clinical pharmacology & toxicology · 2022Article
- Establishing a National Cardiovascular Disease Surveillance System in the United States Using Electronic Health Record Data: Key Strengths and Limitations.Journal of the American Heart Association · 2022Article
- Incidence of major depressive disorder over time in patients with liver cirrhosis: A nationwide population-based study in Korea.PloS one · 2022Article
- New-user and prevalent-user designs and the definition of study time origin in pharmacoepidemiology: A review of reporting practices.Pharmacoepidemiology and drug safety · 2021Review
- Estimating the disease burden of Korean type 2 diabetes mellitus patients considering its complications.PloS one · 2021Article
- Association Between Angiotensin II Receptor Blockers and the Risk of Lung Cancer Among Patients With Hypertension From the Korean National Health Insurance Service-National Health Screening Cohort.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2020Article
- The effects of different lookback periods on the sociodemographic structure of the study population and on the estimation of incidence rates: analyses with German claims data.BMC medical research methodology · 2020Article
Corrections and comments
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Authors and funding
3 authors.
Funding
Abstract
aimsThe purpose of this study was to describe how washout period duration affects the size and accuracy of retrospective incident user cohorts. MATERIALS &
methodsMarketScan commercial claims data from 2007 to 2010 were used and included adults with an antihyperlipidemic, antidiabetic or antidepressant claim in 2010. Incident user cohorts using 3-, 6-, 12-, 24- and 36-month washouts were created and changes in sample size and incident user misclassification were described. RESULTS &
conclusionThe 6- and 12-month washouts excluded 75 and 85% of the samples, respectively. Half of subjects in the 6-month washout cohorts were actually prevalent users, and the 12-month washout period resulted in 30% misclassified. Using common washout periods of 6-12 months may insufficiently address prevalent user bias in large commercial claims databases.
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