Application of longitudinal matching in causal inference for rolling enrollment interventions
Rolling enrollment is a common method for participant recruitment in medical practice.In the longitudinal data,where researchers are often interested in outcomes occurring after a certain period of treatment,the definition of causal effects differs from that in the cross-sectional data.It poses new challenges for the application of matching methods in the longitudinal studies.Longitudinal matching is an extension of matching methods in longitudinal studies involving static interventions such as rolling enrollment.Currently,longitudinal matching methods are widely applied in the comparative effectiveness research.This article elucidates the fundamental principles,applicable conditions,code implementation,and application instances of four longitudinal matching methods through theoretical discussions and empirical illustrations.It provides methodological references for estimating causal effects in longitudinal data analysis.
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