Hi Ken, * Avg: average cortical thickness between time-points * Rate: rate of change of cortical thickness * pc1: rate of change wrt. the first time point * spc: rate of change wrt. average thickness
You can find more info about these in this Longitudinal Tutorial: https://surfer.nmr.mgh.harvard.edu/fswiki/FsTutorial/LongitudinalTutorial Best, Avnish ________________________________ From: freesurfer-boun...@nmr.mgh.harvard.edu <freesurfer-boun...@nmr.mgh.harvard.edu> on behalf of KennethSPrice <kennethspr...@protonmail.com> Sent: Sunday, February 26, 2023 10:41 PM To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu> Subject: [Freesurfer] What's the difference between pc1 and spc (glmfit) External Email - Use Caution Hey Freesurfers, I'm running a longitudinal study and have multiple outputs in my results. What's the difference between the "pc1" files and the "spc" files? Also what do the "rate" and "avg" files represent? Any response would be greatly appreciated! Thanks, Ken Sent with Proton Mail<https://secure-web.cisco.com/1boPq8uQ-9H8Gy1fAGjjCB35J45SPTFBfkpwoo3x3bISPlramWjRzCkj2QOs1sJPXP1cbJUwKMOLlYD63YWzGU9EBm3Tw57AxAjRCgKMlnqytjyEa2NBjYg9nNhdMfD_6PqfocgNn4NPSqnlBOY40azvHRxibf1pMu7BXhgI2Z4ZGzJVQAD9JWcK9U0tcgibjH-xVdDPqj_CDaZkSZocd_lApusMm6LMj8q3GLVZ-30VKDEa-ctLWINE0ImupZ9hOoSI-w6qpE4s4ijyZUIogN4RSmOZRA0prTrDmZI-7VPxHAcLnUKHWDlXIGWhZ-6Fiy7jkRVqKgx1qOm23vSGspw/https%3A%2F%2Fproton.me%2F> secure email.
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