Hi,
I am running a cox proportional hazards model with a
logical covariate (T or F). I would like to use the
coefficient returned by the model to estimate the
hazard ratio between the 2 levels of covariate. to do
this, should I set the contrast option as i)either
"SAS" or "treatment" as following, or ii) just leave
the contrast as default which is "helmert"?
options(contrasts=c("contr.SAS", "contr.poly"))
or
options(contrasts=c("contr.treatment", "contr.poly"))
Thank you
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