search for: survfit_cond

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2006 Jan 29
0
actuarial prevalence plots
...ssentially the prevalence is the Kaplan-Meier prob[having the condition at time t] - KM prob[recovery by time t] (also divided by 1-KM[death by t], although death is not an issue with this data). I can easily produce the relevant actuarial data for either the condition or recovery using survfit(eg survfit_cond$time , survfit_cond$surv, survfit_rec$time, survfit_rec$surv). I then have to calculate (survfit_cond$surv-survfit_rec$surv) at each event time point. Can anyone help me with an easy method to implement this? Or suggest an easier method? I cant find a similar method after searching the contributed...