See ?cox.zph
in library 'survival' -Christos -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Boudreau Jean-Francois Sent: Monday, April 03, 2006 2:58 PM To: [email protected] Subject: [R] testing proportional hazard in a Cox model including atime-varying covariate I am using a syntax like coxph(Surv(start, stop, event) ~ X, data) to estimate the effect of X, which may change at each measurement (every 6 months). Is there anyone who knows a way to test the proportional hazard assumption in that case? Thank you in advance Jean-Frangois Boudreau Sherbrooke University [[alternative HTML version deleted]] ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html
