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cox1
2011 Feb 19
0
contrasting Somer's D from Design package
...the Design package and my problem is detailed
here.
I fit a cox model to my data and validate the Somer's Dxy using the Design
package.
(Because of computation time problem, i only try 10 bootstrap samples for
the time being)
This is the model without stratification:
> library(Design)
> cox1a<-cph(surv.obj~factor(ecog)+factor(grade)+factor(tumor)+factor(extra),x=T,y=T)
> coef1a<-coef(cox1a)
> coef1a
ecog=1 ecog=2 grade=2 grade=3 tumor=2 tumor=3
extra=1
0.3578954 0.8993140 0.4834090 0.5716166 0.7600330 1.5974558
0.8112942
>...