Re: [R] Trend test for survival data

2008-04-22 Thread Terry Therneau
> Hello, > is there a R package that provides a log rank trend test > for survival data in >=3 treatment groups? > Or are there any comparable trend tests for survival data in R? The log-rank test is equivalent to a Cox model with a factor variable as the predictor. To do a trend test, simply

Re: [R] Trend test for survival data

2008-04-22 Thread Heinz Tuechler
Dear Markus! Since I did not see an answer yet, my suggestion is to use coxph with the groups variable numerically coded as the only independent variable. Heinz At 13:39 21.04.2008, Markus Kreuz wrote: >Hello, >is there a R package that provides a log rank trend test >for survival data in >=3 t

[R] Trend test for survival data

2008-04-21 Thread Markus Kreuz
Hello, is there a R package that provides a log rank trend test for survival data in >=3 treatment groups? Or are there any comparable trend tests for survival data in R? Thanks a lot Markus -- Dipl. Inf. Markus Kreuz Universitaet Leipzig Institut fuer medizinische Informatik, Statistik und Epid