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Dear Eugenio,
Thank you for your quick response. Sorry but I am not completely sure if I understood correctly your response. What do you mean with "demeaning" the eTIV first?.
If I understood, a good choice would be to correct the subic_volume before perform the regression using the folliwng formula:
subic_vol = average_eTIV_allsample * subic_vol / eTIV_subject
Thank you.
Best,
Steve.
El mié., 22 abr. 2020 a las 17:35, Steve Petersen (marfneuro@gmail.com) escribió:
Dear Freesurfer experts,
I would like to perform a correlation between the volume of subiculum and some behavioural measures. Before making that correlation, is it necessary to correct the subiculum volume with the eTIV? I have thought of doing it by scaling the subiculum volume as follows:
*subic_vol = mean_eTIV_group * subic_vol / eTIV_subject * Is correct??
mean_eTIV_group = eTIV average of the group to which the subject belongs.
Thanks in advance.
Best regards,
Steve.