Testing associations between cannabis use and subcortical volumes in two large population-based samples.

ABSTRACT:

Background and aims

Disentangling the putative impact of cannabis on brain morphology from other comorbid substance use is critical. After controlling for the effects of nicotine, alcohol and multi-substance use, this study aimed to determine whether frequent cannabis use is associated with significantly smaller subcortical grey matter volumes.

Design

Exploratory analyses using mixed linear models, one per region of interest (ROI), were performed whereby individual differences in volume (outcome) at seven subcortical ROIs were regressed onto cannabis and comorbid substance use (predictors).

Setting

Two large population-based twin samples from the United States and Australia.

Participants

A total of 622 young Australian adults [66% female; μ_age  = 25.

SUBMITTER: Gillespie NA 

PROVIDER: S-EPMC6200645 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature