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leuker
2009 May 18
1
discrepancies between stata and r for a cox regression
...I would like to develop the use of R.
Trying R and more particulary the cox model, I am surprised by discrepancies between results with stata and R for a cox model
With the same data base, I get a hazard ratio (4.82) that is not the same obtained with stata (4.52)
You will find attached the file leukemia.dta I used (Stata)
Here are the codes for R
library(foreign)
leukemia<-read.dta("leukemia.dta")
library(survival)
res <- coxph(Surv(TIME, STATUS)~TREAT, data=leukemia)
summary(res)
and here the codes for for stata
use "leukemia.dta",clear
stset TIME, failure(STATUS=...