a weak trendP <0.01
An additional exploratory search for volumetric differences in the right medial temporal region using unpaired t -tests indicated a reduction of volume in the right hippocampus in the non-Li group relative to the control group (16 voxels, SVC-based pFWE=0.035, peak coordinates x , y , z = (34 −37 −2), T =3.39, Z =3.26), as well as a weak trend toward reduced volume in the right hippocampus in the non-Li group versus the Li group ( P <0.01 uncorrected, peak coordinates x , y , z =(14 −31 11), T =2.66, Z =2.59).