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2011 Mar 07
0
survest() for cph() in Design package
...ator variable to indicate whether age is below 50, 50-69 or >=70, used as strata in the model The SAS code is (if this helps to address my question/problem) proc phreg data=uminers; model rstime*cc(0)=cr500 smoke25/ entry=rsentry offset=logw rl; baseline out=ch covariates=covs cumhaz=cumhaz stdcumhaz=secumhaz lowercumhaz=lci uppercumhaz=uci/ nomean; strata rstime2; run; My R code is: library(survival) library(Design) > uminers<-read.table("uminers.txt",sep='\t',header=T,row.names=NULL) > fit <- cph(Surv(rsentry,rstime,cc)~cr500+smoke25+strat(rstime2) +offset...