Dear R-Help,

I am trying to perform forward selection on the following coxph model:

>my.bpfs <- Surv(bcox$pfsdays, bcox$pfscensor)
> b.cox <- coxph(my.bpfs ~ Cbase + Abase + Cbave + CbSD + KPS + gender +
as.factor(eor) + Age)>stepAIC(b.cox, scope=list(upper =~ Cbase + Abase +
Cbave + CbSD + KPS + gender + as.factor(eor) + Age, lower=~1), direction=
c("forward"))

However the following code returns the full model. How do I write the code
so that forward selection is performed?

Thanks,
Rupa

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