RE: Several occasions durng pregancy
Paul,
I am sure a number of the gurus are busily typing away at this one, but
maybe they are a little slow this Monday morning. Short answer is: yes, you
should code them under one id per patient. However, you will also want to
lump different periods during the pregnancy (perhaps by trimester +
post-partum?) together as a covariate. In this manner, you can look at
between subject variability, and also develop code for examining
interoccasion variability and/or look for an effect of trimester. Good luck.
Kevin Dykstra, PhD, FCP
President/CEO
+1 978.655.1943 (O)
+1 978.289.2987 (M)
[email protected] | http://qPharmetra.com
Quoted reply history
-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of [email protected]
Sent: Monday, February 28, 2011 8:49 AM
To: [email protected]
Subject:
Hi,
Recently we are modeling the ranitidine data in pregnant women. Some of them
were sampled several times in different periods, for example, early, late or
post pregnancy. Should we put all the samplings under one ID of the patient?
or we can treat the several samplings as independent samplings and give them
different ID? Anyone has such repeated measures experiences and any
suggestions will be great appreciated.
Paul
School of Pharmacy
University of Pittsburgh
716 Salk Hall
3501 Terrace Street
Pittsburgh, PA 15261
Phone: 412-648-8546
E-mail: [email protected]