I am quiet new to SAS and I apologize in advance if it is a silly question. I am trying to obtain estimated proportions for a categorical variable, but it seems that I can only get confidence interval if a specify a grouping variable. Suppose I have catVAR1 whose proportion is 0.20, I want to adjust the proportion for age and gender. I have to put gender into the CLASS statement and in the LSMEANS statement of the GLM procedure, like this:
MODEL catVAR1 = gender age;
LSMEANS gender / CL;
This way i get the proportions of catVAR1 for males and females. What if I want the overall proportion in the population, only adjusted for age and gender? if I remove gender from the LSMEANS statement, I get the adjusted proportion but not the CI.
Thanks in advance.
I've never used SURVEYREG. I did look at the example and saw that the sample size was nearly 8000. When your sample size is that large, the Central Limit Theorem allows you to use a linear regression procedure when a categorical regression procedure might be more appropriate.