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2008 Dec 04
1
comparing SAS and R survival analysis with time-dependent covariates
...a tie b/w an event and a time-dependent observation, R gives the same result as SAS. tmp$end[2]=tmp$end[2] + .1 tmp surv = Surv(time=tmp$start, time2=tmp$end, tmp$outcome) cphres = coxph(surv ~ tmp$delir, method="exact") summary(cphres)[["coef"]] Thank you so much for time, Svetlana [[alternative HTML version deleted]]