cannabis use associated_with hippocampus

tested whether cannabis use ... was associated with regional gray matter volume in any of these regions

ever having used cannabis was associated with increased volume in a cluster in the left hippocampus (3.18% greater in ever ...)

ever having used cannabis was associated with increased volume in a cluster in the left hippocampus (3.18% greater ... maximal voxel p-fwe = 0.002)

Cannabis use itself was associated with a modest increase (3.18%) in left (but not right) hippocampal volume.