Re: [R] stratified variables in a cox regression

2009-03-28 Thread Thomas Lumley
On Sat, 28 Mar 2009, Bob Green wrote: Hello, I am hoping for assistance in regards to examining the contribution of stratified variables in a cox regression. A previous post by Terry Therneau noted that "That is the point of a strata; you are declaring a variable toNOT be proportional haz

[R] stratified variables in a cox regression

2009-03-28 Thread Bob Green
Hello, I am hoping for assistance in regards to examining the contribution of stratified variables in a cox regression. A previous post by Terry Therneau noted that "That is the point of a strata; you are declaring a variable to NOT be proportional hazards, and thus there is no single "haz