search for: expcat1

...earlier question could lead to assumptions otherwise. As you can see below, I only get Std. error but not lower and Upper CIs. I was wondering if there is another argument or method, could give CIs which I cannot find anywhere. Thanks Adrian > Nsurv <- survfit(Surv(NOSM,NStat)~as.factor(expcat1),conf.type='none',type='kaplan-meier') > summary(Nsurv,time=c(12,24)) Call: survfit(formula = Surv(NOSM, NStat) ~ as.factor(expcat1), conf.type = "none", type = "kaplan-meier") 1 observation deleted due to missingness as.factor(expcat1)=...

...wise. > > As you can see below, I only get Std. error but not lower and Upper CIs. > > I was wondering if there is another argument or method, could give CIs > which I cannot find anywhere. > > Thanks > Adrian > > >> Nsurv <- survfit(Surv(NOSM,NStat)~as.factor(expcat1),conf.type='none',type='kaplan-meier') > > >> summary(Nsurv,time=c(12,24)) > Call: survfit(formula = Surv(NOSM, NStat) ~ as.factor(expcat1), > conf.type = "none", type = "kaplan-meier") > > 1 observation deleted due to missingness >...

??? Both ?survit.object (linked in the see also section of ?survfit) and ?summary.survfit give you this information. Do you not know how to use R's help faciities -- in which case you should learn them now; see ?help -- or have I misunderstood your query? Cheers, Bert Bert Gunter "The trouble with having an open mind is that people keep coming along and sticking things into it."

Hi I am not sure hiw to get thr CI from summary function on the survfit object. I can get the percent survival for 2 years from survfit object but I dont get Confidence intervals Could anyone suggest a hint Thanks Adrian [[alternative HTML version deleted]]