Your code doesn't include any reference to maltreatment and your model doesn't include any reference to PID...
Assuming that all your independent variables are classes, you could start with:
TITLE1 "Single-Level Logistic Model Predicting Chronic Pain";
PROC GLIMMIX DATA=work.pain NOCLPRINT NAMELEN=100 METHOD=QUAD (QPOINTS=15) GRADIENT;
CLASS age_c Gender GroupHome RndChron_c;
MODEL chronicPain (event="1") = age_c Gender GroupHome RndChron_c / SOLUTION LINK=LOGIT DIST=BINARY DDFM=Satterthwaite;
lsmeans age_c / oddsratio;
lsmeans gender / oddsratio;
lsmeans groupHome / oddsratio;
lsmeans RndChron_c / oddsratio;
RUN;
(untested)
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