Message-ID: <6.1.2.0.1.20041109112147.01b36498@l.mail.virginia.edu>
Date: 2004-11-09T16:26:56Z
From: Lei Liu
Subject: frailty model for gap times
Hi there,
I have a question on the frailty model for gap times with distinct baseline
hazard for each gap. Can I use R coxph function to do it? For example, the
following code assumes an identical baseline hazard for every gap time, but
what if I want a distinct baseline hazard for each gap?
coxph(Surv(gap,status)~trt+frailty(id))
Thanks in advance!
Lei Liu
Assistant Professor
Division of Biostatistics and Epidemiology
Dept. of Health Evaluation Sciences
School of Medicine
University of Virginia
3181 Hospital West Complex
Charlottesville, VA 22908-0717
1-434-982-3364 (o)
1-734-730-1395 (c)
liulei at virginia.edu
ll9f at virginia.edu