[BioC] forward conditional Cox and logistic regression

Laurent Gautier laurent at cbs.dtu.dk
Tue Dec 9 10:53:57 CET 2008

That's more an R question than a bioconductor question, I suppose.

I am not extremely familiar with SPSS but I suspect that "forward 
conditional" means here "forward conditional selection" (and that's 
variable selection).

stepAIC() in MASS should work with coxph.

(a quick check on the mailing list archives seems to confirm it


Katleen De Preter wrote:
> Hi,
> I would like to perform Cox proportional hazard survival analysis as 
> well as logistic regression analysis in R. At this moment I'm using the 
> SPSS program to do these analysis (forward or backward conditional, to 
> build a model and to obtain the hazard ratios). However, it is unclear 
> to me which package and commands I can use to do exactly the same in R? 
> For Cox you can used coxph: however, it is unclear how you can do it 
> with the forward conditional method?
> Is there a way to do it in R? And what with logistic regression?
> Thanks,
> Best regards,
> Katleen De Preter

Laurent Gautier, Ph.D.
Building 301, CBS - Technical University of Denmark
DK-2800 Lyngby
tel: +45 45 25 61 45

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