[R] SAS and R code hazard ratios
Greetings,
I am new to R and have been comparing CPH survival analysis hazard ratios
between R and SAS PhReg. The binary covariates' HRs are the same, however
the continuous variables, for example age, have quite different HRs
although in the same direction. SAS PhReg produces HRs which are the
change in risk for every one increment change in the independent variable.
How do I interpret the HRs produced by R?Thanks much, C
Colleen Ross, MS
Clinical Research Unit
Kaiser Permanente Colorado
(303) 614-1244
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Re: [R] SAS and R code hazard ratios
[EMAIL PROTECTED] wrote: Greetings, I am new to R and have been comparing CPH survival analysis hazard ratios between R and SAS PhReg. The binary covariates' HRs are the same, however the continuous variables, for example age, have quite different HRs although in the same direction. SAS PhReg produces HRs which are the change in risk for every one increment change in the independent variable. How do I interpret the HRs produced by R?Thanks much, C I'm not aware of peculiarities. You're not giving us much to go on though. In fact, not even the function used to fit the model with. __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Exactly... __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
Re: [R] SAS and R code hazard ratios
On Wed, 10 Jan 2007, [EMAIL PROTECTED] wrote: I am new to R and have been comparing CPH survival analysis hazard ratios between R and SAS PhReg. The binary covariates' HRs are the same, however the continuous variables, for example age, have quite different HRs although in the same direction. SAS PhReg produces HRs which are the change in risk for every one increment change in the independent variable. How do I interpret the HRs produced by R?Thanks much, C What function did you use to fit the model in R? If you used coxph(), in the survival package then you should get the same answers as SAS. If you used cph() in the design package then the output says what the increment is that correponds to the quoted hazard ratio, and the default is the interquartile range. -thomas __ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
