AFNI Message Board

Dear AFNI users-

We are very pleased to announce that the new AFNI Message Board framework is up! Please join us at:

https://discuss.afni.nimh.nih.gov

Existing user accounts have been migrated, so returning users can login by requesting a password reset. New users can create accounts, as well, through a standard account creation process. Please note that these setup emails might initially go to spam folders (esp. for NIH users!), so please check those locations in the beginning.

The current Message Board discussion threads have been migrated to the new framework. The current Message Board will remain visible, but read-only, for a little while.

Sincerely, AFNI HQ

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mrif
January 05, 2021 08:22PM
Hello,


We have within-subject design where participants are scanned on multiple visits (4 times per participant). Time between visits is 2 years. Some visits are missing for a few participants. We'll call this variable 'time'.

We also collected two quantitative variables ("weight", "age") during each visit, so we have two time-variant covariates to add to the model

1) Can 3dLME handles missing data for -qvars? For example, we have imaging data for participant 5, visits 1, 2,3,4, but are missing behavior data for visit 2.

2). With respect to the model, we are also interested in each of the two qvars effect on the imaging data. Would our model formula look like the following: "-model 'time*weight*age'?

3) If so, would this also provide the interaction terms of time*weight and time*age, weight*age, and time*weight*age in the results?

Thanks


Michael
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Subject Author Posted

3dLME question

mrif January 05, 2021 08:22PM

Re: 3dLME question

gang January 06, 2021 02:00PM

Re: 3dLME question

mrif January 09, 2021 01:22AM

Re: 3dLME question

gang January 10, 2021 08:40AM

Re: 3dLME question

mrif January 12, 2021 02:00PM