Re: [R] Survfit: why different survival curves but same parameter estimates?

2011-01-17 Thread Terry Therneau
begin included message I'm trying to estimate a Cox proportional hazard model with time-varying covariates using coxph. The parameter estimates are fine but there is something wrong with the survival curves I get with survfit (results are not plausible). -- end inclusion This s

[R] Survfit: why different survival curves but same parameter estimates?

2011-01-14 Thread Denis Pelletier
Hello, I'm trying to estimate a Cox proportional hazard model with time-varying covariates using coxph. The parameter estimates are fine but there is something wrong with the survival curves I get with survfit (results are not plausible). Let me explain why I think something's wrong. To make s