External Email - Use Caution Dear Douglas,
I am sorry for the late response. I did not see your message up until now. I would like to see how the brain changes for a patient with anxiety who got better gradually (again, we have 5-time points (0, 3, 6, 9, 12). And then do the same for another participant who did not get better up until 12 months. That is the reason I would like to look at patients one by one. I ran the mri_glmfit analysis but I received an error message: ERROR: DOF=0 Is this because I tried to run it on one participant? Sincerely, Isa Rosselini Date: Mon, 3 Feb 2025 09:20:40 -0500 From: "Douglas N. Greve" <[email protected]> Subject: Re: [Freesurfer] longitudinal analysis on one subject To: [email protected] Message-ID: <[email protected]> Content-Type: text/plain; charset="utf-8" The glm can be run on this data in theory. With only 5 time points, you probably won't have much power though. What are you trying to test? On Sat, Feb 1, 2025 at 11:56 PM Isabella Rossellini <[email protected]> wrote: > > Hello Freesurfer users/experts, > > I am working with Freesurfer 7.4.1 on a MacStudio (macOS 15.2) and I would > like to ask your opinion about the following. > > Basically, we had an anxiety treatment study and I would like to analyze one > subject who has 5-time points (0, 3, 6, 9, 12) with a longitudinal pipeline, > two-stage model. > Is it possible to run this on one person only and see the changes between > these time points? > > I have never done this before on one subject so I am not sure what the best > approach would be to look at the changes. > After running the longitudinal preprocessing (base, long), should I generate > the tables of freesurfer parcellation/segmentation stats data > (aparcstats2table, asegstats2table)? > Or can I just follow the two stage model steps? Maybe glm only works on a > group of subjects. > https://secure-web.cisco.com/1RCkpkv-7j7POY3iFHgRmXEUWgfCzKlqbBUGWLnc2RlZdY5nRKqE-Tyb58jPc7L5ZPOCj6Wk4FkzBnwiIVrHsBykQRm-l3Jn-ZMspfbCqLAWIrq78XF02rbouW2bUaQWQNyt7YSwswKJilktqReJF5U1Df5Vr3t2cMRnUzqQLCxsS8m1HXvZ131aAEwaFpFcRjH7wSODHJcqJ6YZa9avlKQ_jV6v0vzL-YLQKMIh0TQ8l5U9AvXEtxA3wt-JqnjnWCnYOTs0hem1ZdTHwx61ND4OhpBsVvE3WulFdmyCEXSNxDeIjuj_Ox30tQ-CZXxiEPu7qmKWNnFc710luNzkSnQ/https%3A%2F%2Fsurfer.nmr.mgh.harvard.edu%2Ffswiki%2FLongitudinalTwoStageModel > > (We have 9 more subjects - 10 in total - so I was hoping to visualize the > pattern of changes one by one, in each subject, since these patients showed > different changes in anxiety based on self-reported > questionnaires) > > Sincerely, > Isa Rosselini > _______________________________________________ Freesurfer mailing list [email protected] https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Mass General Brigham Compliance HelpLine at https://www.massgeneralbrigham.org/complianceline <https://www.massgeneralbrigham.org/complianceline> . Please note that this e-mail is not secure (encrypted). If you do not wish to continue communication over unencrypted e-mail, please notify the sender of this message immediately. Continuing to send or respond to e-mail after receiving this message means you understand and accept this risk and wish to continue to communicate over unencrypted e-mail.
