[R] Confidence interval of Survival Curve of Weighted Cox Regression

[David Winsemius]

On Feb 15, 2011, at 9:05 PM, jeanneyue wrote:

>
> Hi,
>
> May I know how to obtain the confidence interval of the survival  
> curve of
> weighted Cox regression model?
> I tried coxph, cph, and coxphw, but they did not work.
> Any help would be much appreciated.

One possible reason that this question may have gone unanswered is  
that it is too vague. You don't indicate enough about your data  
situation or research goals to answer the question. And you are  
mentioning functions from different packages but not the name of the  
packages. I know for instance that cph is from rms and the it is not  
used to generate confidence intervals but that Predict would. Perhaps  
the same situation exists for coxph (presumably from survival) and  
coxphw whixh is not from either of hthose two packages.

You are asked to offered code and at the very least a description of  
the data.In that manner we can figure out what you mean by weights, a  
term that has at least two (and maybe more)  different interpretations  
in this context.

Since it appears you have not read the Posting Guide, please do so now  
and then post a more complete question.

-- 

David Winsemius, MD
West Hartford, CT