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stat.ME2025
Analysis of Stepped-Wedge Cluster Randomized Trials when treatment effects vary by exposure time or calendar time
Kenneth M. Lee, Elizabeth L. Turner, Avi Kenny
Stepped-wedge cluster randomized trials (SW-CRTs) are traditionally analyzed with models that assume an immediate and sustained treatment effect. Previous work has shown that makin…
stat.ME2024
How should parallel cluster randomized trials with a baseline period be analyzed? A survey of estimands and common estimators
Kenneth Menglin Lee, Fan Li
The parallel cluster randomized trial with baseline (PB-CRT) is a common variant of the standard parallel cluster randomized trial (P-CRT). We define two natural estimands in the c…