Random effect for patient change center during follow up

[lih]

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

[lih]

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

[PeterClemmensen]

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

[Kurt_Bremser]

I merged the posts.