@joesmama wrote:
do I still need to use the BASELINE option to define the reference group for the model? Or is this redundant?
That's not what the baseline statement does.
The BASELINE statement creates a SAS data set (named by the OUT= option) that contains the baseline function estimates at the event times of each stratum for every set of covariates in the COVARIATES= data set.
The default reference values are used if not specified elsewhere, if that's what you're asking.
@joesmama wrote:
Hello,
When using PROC PHREG,
If my model is made up of entirely categorical variables and each of those variables is put in the class statement with a reference group, do I still need to use the BASELINE option to define the reference group for the model? Or is this redundant?
proc phreg data=grands plots=survival;
class grade(ref="Grade 1") gender(ref="Male") marst(ref="Married") stage(ref="Stage 1");
model survivem*cs_vital(0) = grade gender marst;
by stage;
run;
Thank you.
