Fig. 3
From: Crude incidence in two-phase designs in the presence of competing risks
Coverage of confidence intervals. Simulation results for the coverage of confidence intervals (CI) under random (panel a), case-control (panel b), stratified (panel c) and nested case-control sampling (m=1, panel d). For the first three scenarios a sample size of 100 was used, while in the nested case control sampling a mean of 180 subjects was considered. Data were subject to a random censoring of 15 % (over administrative censoring). Dotted lines represent the reference for CI coverage (nominal 95 %)