How do I avoid "WARNING: Class levels for <var> are not printed because of excessive size."? SAS 9.4

[claudiajc]

Hi,

I am currently running the model below  It runs fine and I obtain the output data sets I want.  However, it shows "WARNING: Class levels for USUBJID are not printed because of excessive size".  There are a few hundred of subjects in this data set, and there are several records per subjects.

a) Why am I getting this warning?

b) Is this 'warning' unavoidable?

c) Does it affect the statistical analysis? 

d) What would you recommend I do to avoid this warning being shown?

Many thanks,

Claudia

ods listing close;

proc glimmix data=one order=data;

 nloptions tech=nrridg;

 class                  trt01pn day period usubjid;

 model avalc(event='Y')=trt01pn day trt01pn*day period base/link=logit dist=binary s ddfm=kr;

 random intercept day period/type=vc subject=usubjid;

 lsmeans trt01pn*day trt01pn/ilink diff obsmargins cl oddsratio; 

ods output 

           ConvergenceStatus=status

           LSmeans=lsmeans

           Diffs=diffs

           tests3=Tests3;

 run;

quit;

ods listing;

[PaigeMiller · Accepted solution]

a) Why am I getting this warning?

I think that's pretty clear, you have too many levels of USUBJID

b) Is this 'warning' unavoidable?

Probably, in this case with hundreds of subjects.

c) Does it affect the statistical analysis? 

No, I don't think so. The WARNING message would have told you the model fit is suspect, or words like that.

d) What would you recommend I do to avoid this warning being shown?

I don't know, if you really have to model hundreds of subjects, you're probably going to get this message.

[claudiajc]

Thanks, Paige!
Best wishes,
Claudia