Dear Terry, Thanks for responding to my question. I am starting to understand CI now, but I still have a general question: in oncology medical literature, when the study endpoint is recurrence, it's so common to see publications with Kaplan-Meier survival curves (time to recurrence or recurrence-free survival) with death as being censored. Because death is a competing risk for recurrence, does this mean those KM curves are not appropriate, instead CI curves should be used?
Thanks very much! John ----- Original Message ---- From: Terry Therneau <thern...@mayo.edu> To: array chip <arrayprof...@yahoo.com> Cc: r-help@r-project.org Sent: Thu, June 30, 2011 6:48:13 AM Subject: Re: cumulative incidence plot vs survival plot > Hi, I am wondering if anyone can explain to me if cumulative incidence > (CI) is .... The cumulative incidence curve and the KM are not the same, when there are multiple outcomes. See the "etype" argument to survfit, which is used to create CI curves (?survfit.formula). For testing differences between CI curves use the cmprsk library from Gray; it can also draw curves by the survfit routine has a lot more flexibility. Terry Therneau ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
