Dear all, I would like to know how to calculate the median follow-up time from using function prodlim. By using reverse=TRUE i should get correct estimates when there are ties involved and I want to know how to get the median follow-up times from a Kaplan-meier survival function stratified by sex. In summary.prodlim I have to specify times, but I want to know the median times per sex from the median survival estimates. prodlim(Surv(duration,status==1)~sex,reverse=TRUE) Best regards Ove