Displaying 1 result from an estimated 1 matches for "censottp".
2007 Jan 25
0
cox.zph vs log-log survival plot
Hello,
Excuse me for a more methodological than technical question. I'm developing a Cox model with 10 covariates. One of them is age (named "eta"). I've checked proportionality with cox.zph with age continuous:
> cox.zph(coxph(Surv(TTP,CENSOTTP)~eta))
rho chisq p
eta -0.0154 0.0225 0.88
and categorical (eta<60):
> cox.zph(coxph(Surv(TTP,CENSOTTP)~eta<60))
rho chisq p
eta < 60TRUE 0.0168 0.0255 0.873
it seems ok but when I check graphical pattern of log-minu...