topic Re: Random effect for patient change center during follow up in Statistical Procedures

Random effect for patient change center during follow up

lih — Mon, 22 May 2017 14:40:05 GMT

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

Random effect for patient change center during follow up

lih — Mon, 22 May 2017 14:35:38 GMT

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

Re: Random effect for patient change center during follow up

PeterClemmensen — Mon, 22 May 2017 14:37:21 GMT

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

Re: Random effect for patient change center during follow up

Kurt_Bremser — Mon, 22 May 2017 15:16:22 GMT

I merged the posts.