Date: Fri, 19 Sep 2003 16:20:15 -0500
Reply-To: Paul R Swank <Paul.R.Swank@uth.tmc.edu>
Sender: "SPSSX(r) Discussion" <SPSSX-L@LISTSERV.UGA.EDU>
From: Paul R Swank <Paul.R.Swank@uth.tmc.edu>
Subject: Re: repeated measures multiple comparisons
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Include hospital type as an independent variable (fixed effect) along
Paul R. Swank, Ph.D.
Professor, Developmental Pediatrics
UT Health Science Center at Houston
From: SPSSX(r) Discussion [mailto:SPSSX-L@LISTSERV.UGA.EDU] On Behalf Of
Sent: Friday, September 19, 2003 1:33 PM
Subject: repeated measures multiple comparisons
I have a customer who has measured Blood-glucose levels over 3 visits
while Fasting and after eating. Therefore, there are 2 measures named
Fasting and PostPar measured at 3 levels. There are 2 between subject
factors named Hospital (2 groups, private and
government) and Patient Group (control and study).
Within each hospital type, I can work out if there is a difference from
visit 1 to visit 2, visit 2 to visit 3 for the control group and the
study group seperately via the repeated measures syntax: /EMMEANS =
The customer would like for each hospital to compare the study group and
the control group on the mean difference from visit 1 to visit 2 and
visit 2 to visit 3 to see which group has had the biggest increase or
decrease from visit to visit.
The only way in repeated measures I can see of doing this is to Split
the file first by Hospital Type, enter the Patient Group as a Between
Subject factor and choose Repeated Contrasts. Then the Test of
Within-Subject Contrasts gives me the interaction between VISIT*GROUP
comparing Level 1 to Level 2 and Level 2 to Level 3.
Is there another way in repeated measures of achieving this?
Thanks in advance,
Application support specialist (Statistics and Databases), Information
Services, Cardiff University. Tel. 02920 (875035).