please ignore. actually the median survival from survfit() is the mean of the 2 time points.
________________________________ To: R help <r-help@r-project.org> Sent: Tuesday, January 28, 2014 11:27 AM Subject: [R] median survival Hi, if 50% survival probability horizontal line in a Kaplan-Meier survival curve overlap one of the step line between 2 time points t1 and t2, the survfit() from survival package estimates median survival as t2 (the longest time point). But I saw some articles (page 23: http://www.amstat.org/chapters/northeasternillinois/pastevents/presentations/summer05_Ibrahim_J.pdf) recommend the smallest time t such time S(t)<=0.5. What is the convention for the definition of median survival? Thanks John [[alternative HTML version deleted]] ______________________________________________ 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. [[alternative HTML version deleted]]
______________________________________________ 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.
