A Comparison of One-Stage vs Two-Stage Individual Patient Data Meta-Analysis Methods: A Simulation Study

Autor/in	Kontopantelis, Evangelos
Titel	A Comparison of One-Stage vs Two-Stage Individual Patient Data Meta-Analysis Methods: A Simulation Study
Quelle	In: Research Synthesis Methods, 9 (2018) 3, S.417-430 (14 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	ORCID (Kontopantelis, Evangelos)
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1759-2879
DOI	10.1002/jrsm.1303
Schlagwörter	Patients; Medical Research; Meta Analysis; Intervention; Comparative Analysis; Simulation; Error of Measurement; Outcomes of Treatment; Vignettes; Statistical Bias; Models + Suchen Sie Ihr Suchwort? Patient; Meta-analysis; Metaanalyse; Simulation program; Simulationsprogramm; Messfehler; Analogiemodell
Abstract	Background: Individual patient data (IPD) meta-analysis allows for the exploration of heterogeneity and can identify subgroups that most benefit from an intervention (or exposure), much more successfully than meta-analysis of aggregate data. One-stage or two-stage IPD meta-analysis is possible, with the former using mixed-effects regression models and the latter obtaining study estimates through simpler regression models before aggregating using standard meta-analysis methodology. However, a comprehensive comparison of the two methods, in practice, is lacking. Methods: We generated 1000 datasets for each of many simulation scenarios covering different IPD sizes and different between-study variance (heterogeneity) assumptions at various levels (intercept and exposure). Numerous simulation settings of different assumptions were also used, while we evaluated performance both on main effects and interaction effects. Performance was assessed on mean bias, mean error, coverage, and power. Results: Fully specified one-stage models (random study intercept or fixed study-specific intercept; random exposure effect; and fixed study-specific effects for covariate) were the best performers overall, especially when investigating interactions. For main effects, performance was almost identical across models unless intercept heterogeneity was present, in which case the fully specified one-stage and the two-stage models performed better. For interaction effects, differences across models were greater with the two-stage model consistently outperformed by the two fully specified one-stage models. Conclusions: A fully specified one-stage model should be preferred (accounting for potential exposure, intercept, and, possibly, interaction heterogeneity), especially when investigating interactions. If non-convergence is encountered with a random study intercept, the fixed study-specific intercept one-stage model should be used instead. (As Provided).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2024/1/01