Hi I have two groups I want to compare, in total 172 scans Of these 78 got a a follow up. Groups are approximately evenly distributed.
I want to do first a cross sectional comparison and subsequently a longitudinal analysis for the 78 subjects only. My question is: (1) Is it is valid to analyse all data using the longitudinal processing stream ( e.g. recon-all -all, recon-all -base, recon-all -long), even though I do separate cross sectional and longitudinal analyses? Or (2) should I analyse first the 175 using the cross sectional stream and then separately analyse the 78 with a follow up scan with the longitudinal stream? Of course I would prefer option 1 as that would reduce potential editing/adjusting many thanks in advance William _______________________________________________ Freesurfer mailing list Freesurfer@nmr.mgh.harvard.edu 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 Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
