The supratentorial volume increased about 1.0% (p<.0001). The average supratentorial volume of the boys was larger than that of the girls at both MRIs (p=.0001), but percentage volume change (boys=1.0% vs. girls=0.8%) was not related to sex (t(26)=6.97, p=.49) or BMI (r=−.22, p=.25). Similarly for the tissue and CSF ROIs, the boys generally had larger volumes than the girls, but there were no significant differences between boys and girls in percentage change for any of the 21 ROIs (the largest t-value=1.375, p=.1809).
