R help - May 2011 - K-M probability for each subject

Dear R-user,

I would like to get the survival probability (surv) for each subject id.
That is, I want to have additional column surv as follows:

id  OS  OS_DUR  surv
____________________


eg:
fitKM<-survfit(Surv(OS_DUR,OS)~1,data=data)
fitKM$surv # this will only give me survival probability and I do not know
the corresponding id

Any one knows how to get the probability?

Thanks a lot,

Kate

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On May 19, 2011, at 5:20 PM, hsu ya-hui wrote:
> Dear R-user,
>
> I would like to get the survival probability (surv) for each subject  
> id.
> That is, I want to have additional column surv as follows:
The survival probability for each subject is 1 until death and 0  
thereafter.
>
> id  OS  OS_DUR  surv
> ____________________
>
>
> eg:
> fitKM<-survfit(Surv(OS_DUR,OS)~1,data=data)
> fitKM$surv # this will only give me survival probability and I do  
> not know
> the corresponding id
>
> Any one knows how to get the probability?
What do you really want?

-- 
David Winsemius, MD
West Hartford, CT