> Why do I get different sign of the coefficients of covariates when I run the
> semi-parametric proportional hazard model (coxph) compared to the parametric
> proportional hazard model (survreg)?
Survreg models the time till death, a postive coefficient --> a longer time.
Coxph models the death rate, a positive coefficient --> higher death rate.
So in the first a positive is good, in the second it is bad.
> Anyone with experience in extracting information form survreg to make
> predictions are free to contact me.
Commonly one would use predict(fit) to get predictions. There are several
options.
Terry Therneau
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