Posted by
Maguin, Eugene on
Jun 16, 2021; 3:24pm
URL: http://spssx-discussion.165.s1.nabble.com/Association-between-two-variables-over-time-tp5740594p5740595.html
So, two cases: same timepoints or different time points.
Same timepoints. Timepoints are rows. Column 1 (variable 1) is first outcome. Column 2 (variable 2) is second outcome.
Different timepoints. You have to match up outcomes based on their date similarity and then proceed as if the timepoints were the same. It might be quite hard to do this in spss but it depends on the pattern of differences. I think I'd put the data in excel and match up cases according to whether the date difference is less than some value. Good Luck with this!
Gene Maguin
-----Original Message-----
From: SPSSX(r) Discussion <
[hidden email]> On Behalf Of AndreasV
Sent: Wednesday, June 16, 2021 5:26 AM
To:
[hidden email]
Subject: Association between two variables over time
I would like to investigate the association between serial measurements of two metric outcomes (e.g., two laboratory parameters measures repeatedly over several years). Depending on the data set, measurements may have been obtained at the same time points for all subjects (study data) or at different time points ('real world' data). Moreover, I may or may not have to perform comparisons between subsets of subjects (defined, e.g., by different treatments received).
- What is the most appropriate statistical procedure for this, and
- (how) can this be done in SPSS (I use Version 24)?
Thank you very much!
Andreas
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