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help > RE: longitudinal 2 groups comparison
Dec 13, 2016 09:12 PM | Andrew Zalesky
RE: longitudinal 2 groups comparison
Hi Yawu,
examples of this kind of design can be found in previous posts on this forum.
In brief, your design matrix should comprise a column for the main effect of group (1=patient; 0=control), another column for the main effect of time (0=first time point; 1=second time point), another column for age.
Finally, if the follow-up period involves the same subjects as baseline, you should consider a repeated measures design and add a separate column for each individual, where each column will contain two 1's indicating the individual, with 0's elsewhere.
Andrew
Originally posted by Yawu Liu:
examples of this kind of design can be found in previous posts on this forum.
In brief, your design matrix should comprise a column for the main effect of group (1=patient; 0=control), another column for the main effect of time (0=first time point; 1=second time point), another column for age.
Finally, if the follow-up period involves the same subjects as baseline, you should consider a repeated measures design and add a separate column for each individual, where each column will contain two 1's indicating the individual, with 0's elsewhere.
Andrew
Originally posted by Yawu Liu:
Hi experts,
I am new NBSer. I have two groups, one is ctr, another is intervention. After 2 years followup, I would like to check 1) is there any difference in network at baseline and followup between two groups, 2) if the change in network during the 2 years differed between the two groups, and use age as a confounder. How to design the matrix?
Thanks in advance,
Best regards,
Yawu
I am new NBSer. I have two groups, one is ctr, another is intervention. After 2 years followup, I would like to check 1) is there any difference in network at baseline and followup between two groups, 2) if the change in network during the 2 years differed between the two groups, and use age as a confounder. How to design the matrix?
Thanks in advance,
Best regards,
Yawu
Threaded View
| Title | Author | Date |
|---|---|---|
| Yawu Liu | Dec 13, 2016 | |
| Andrew Zalesky | Dec 13, 2016 | |
| Shania Soman | Nov 4, 2020 | |
| Andrew Zalesky | Nov 4, 2020 | |
| Shania Soman | Nov 22, 2020 | |
| Andrew Zalesky | Nov 24, 2020 | |
| Yawu Liu | Dec 14, 2016 | |