机译:Interim analysis based on the weighted log-rank test for delayed treatment effects under staggered patient entry
Pfizer Japan Inc, Biostat & Programming, Vaccine Res, Tokyo, Japan;
Univ Tokyo, Sch Publ Hlth, Grad Sch Med, Dept Biostat, Tokyo, Japan;
Delayed treatment effect; group sequential method; interim analysis; stochastic curtailment; time-to-event data; weighted log-rank test;