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- W2804355536 abstract "Several drugs share the same therapeutic indication, including those undergoing patent expiration. Concerns on the interchangeability are frequent in clinical practice, challenging the evaluation of switchability through observational research. The objective of this study was to conduct a scoping review of observational studies on drug switchability to identify methodological strategies adopted to deal with bias and confounding.We searched PubMed, EMBASE, and Web of Science (updated January 31, 2017) to identify studies evaluating switchability in terms of effectiveness/safety outcomes or compliance. Three reviewers independently screened studies extracting all characteristics. Strategies to address confounding, particularly previous drug use and switching reasons, were considered. All findings were summarized in descriptive analyses.Thirty-two studies, published in the last 10 years, met the inclusion criteria. Epilepsy, cardiovascular, and rheumatology were the most frequently represented clinical areas. Seventy-five percent of the studies reported data on effectiveness/safety outcomes. The most frequent study design was cohort (65.6%) followed by case-control (21.9%) and self-controlled (12.5%). Case-control and case-crossover studies showed homogeneous methodological strategies to deal with bias and confounding. Among cohort studies, the confounding associated with previous drug use was addressed introducing variables in multivariate model (47.3%) or selecting only adherent patients (14.3%). Around 30% of cohort studies did not report reasons for switching. In the remaining 70%, clinical parameters or previous occurrence of outcomes was measured to identify switching connected with lack of effectiveness or adverse events.This study represents a starting point for researchers and administrators who are approaching the investigation and assessment of issues related to interchangeability of drugs." @default.
- W2804355536 created "2018-06-01" @default.
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- W2804355536 date "2018-09-01" @default.
- W2804355536 modified "2023-10-16" @default.
- W2804355536 title "Studies on drug switchability showed heterogeneity in methodological approaches: a scoping review" @default.
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- W2804355536 doi "https://doi.org/10.1016/j.jclinepi.2018.05.003" @default.
- W2804355536 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29777799" @default.
- W2804355536 hasPublicationYear "2018" @default.
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