Correlation between clinical variables and GMV in patients with SCI and between clinical variables and GMV of SCI sub-groups In all patients with SCI, partial correlation analyses showed a trend toward negative correlation between right OFC GMV and the injury duration ( r = −0.448, p = 0.055, uncorrected).
In the present study, we found a negative trend for the correlation between right OFC GMV of patients with SCI and injury duration ( p = 0.055) and a significant negative correlation between right OFC GMV of sub-acute subgroup and injury duration ( p = 0.035), indicating that longer disease course may lead to severer GM atrophy, especially in the sub-acute stage (duration 1–12 months), which is consistent with the findings of some previous studies (Freund et al., 2011 , 2013 ).