ROI-wise and vertex-wise analyses are different and may give different results. The vertex-wise analysis looks at individual vertices whereas ROI-wise averages over all the vertices. It is possible (even expected) that averaging over all vertices will reduce the variation and give stronger statistics than vertex-wise.
On 7/2/2021 10:07 AM, Satoko KINA wrote: > External Email - Use Caution > > Hello Freesurfer Developers, > > > As a result of whole-brain analysis using qdec, specific regions with > significant differences between the two groups were depicted (e.g., > paracentral cortical thickness). > Based on this result, we compared the paracentral region on the > Desikan-killiany atlas from aparc.stats between the two groups, and found > significant differences not only in CT but also in items rejected by qdec > (e.g., curv). How should we interpret this result? Which result is more > reliable? Can we consider the result of the analysis focused on a narrow > region of each ROI as a more detailed result because qdec is a whole brain > analysis? > I am not familiar with statistics, so please forgive me if this is a > misguided question. > > Thank you for help! > > > Satoko > > _______________________________________________ > Freesurfer mailing list > Freesurfer@nmr.mgh.harvard.edu > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer _______________________________________________ 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 Mass General Brigham Compliance HelpLine at http://www.massgeneralbrigham.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. 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.
