In general, patients don't change cetert in a multicenter follow up study, we can set 'random intercept / subject=center; random intercept /subject=patient(ceter)' to account center variability. What if some patients changed center in middle of follow up (a patient had test in center1 in visit 1 and 2 then mobed to center2 for visit 3 and 4)?
proc glimmix;
class patient center;
model outcome=visit;
random intercept / subject=center;
random intercept /subject=patient(center);
run;
Thanks,
HL
In general, patients don't change cetert in a multicenter follow up study, we can set 'random intercept / subject=center; random intercept /subject=patient(ceter)' to account center variability. What if some patients changed center in middle of follow up (a patient had test in center1 in visit 1 and 2 then mobed to center2 for visit 3 and 4)?
proc glimmix;
class patient center;
model outcome=visit;
random intercept / subject=center;
random intercept /subject=patient(center);
run;
Thanks,
HL
You'll have more luck posting this type of question in the statistical procedure forum here:
https://communities.sas.com/t5/SAS-Statistical-Procedures/bd-p/statistical_procedures
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