1. A censored observation 2. It does not relate to either 3. See ?print.survfit . Recall also that the mean of a positive random variable is the integral from 0 to infinity of the survival function. The truncated mean is the integral from 0 to tau (819 in your case) of the survival function.
Chris -----Original Message----- From: Steve Einbender [mailto:steve.einben...@gmail.com] Sent: Monday, March 04, 2013 7:44 AM To: r-help Subject: [R] survfit plot question Hello, I create a plot from a coxph object called fit.ads4: plot(survfit(fit.ads4)) plot is located at: https://www.dropbox.com/s/9jswrzid7mp1u62/survfit%20plot.png I also create the following survfit statistics: > print(survfit(fit.ads4),print.rmean=T) Call: survfit(formula = fit.ads4) records n.max n.start events *rmean *se(rmean) median 0.95LCL 0.95UCL 203.0 100.0 100.0 103.0 486.7 24.4 387.0 340.0 467.0 * restricted mean with upper limit = 819 Questions: 1. What is the cross mark in the plot ? 2. How does the cross mark in the plot relate to either the "rmean" or the "median" from survfit ? 3. What is the meaning of the "restricted mean" ? The "upper limit" noted in the output is the "end of the observation period" (i.e., it is always the Stop value in the Censored observation) Thanks for taking the time to review Steve [[alternative HTML version deleted]] ********************************************************** Electronic Mail is not secure, may not be read every day, and should not be used for urgent or sensitive issues ______________________________________________ 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.
