No significant GMV differences were observed at baseline between those participants who were abstinent for cannabis use at age 14 but reported at least 10 instances of use by age 16 and matched controls (i.e., Cohort 2) in those regions defined in Cohort 1
| Region | Vol | Peak voxel | |
|---|---|---|---|
| Left temporal | 4968 vox (16,767 μl) | −55, −2, −14 | F(1,125) = 3.026, pcorr = 0.252 |
| Right temporal | 3710 vox (12,491 μl) | 30, −11, −27 | F(1,125) = 5.626, pcorr = 0.057 |
| Bilateral posterior/inferior parietal | 4959 vox (16,737 μl) | −24, −59, 3 | F(1,125) = 0.021, pcorr ≈ 1 |