Impacts of recreational cannabis legalization on cannabis use: a longitudinal discordant twin study.

ABSTRACT:

Aims

To estimate the effect of recreational legalization on cannabis use frequency and sources of variance across legal environments.

Design

Longitudinal discordant twin and gene-environment interaction models in twins recruited from birth records and assessed prospectively.

Setting

The United States, including states with different recreational cannabis policies before and after 2014, when recreational cannabis was first legalized.

Participants

Two longitudinal, prospectively assessed samples of American twins aged 24-47 (n = 1425 in legal states, n = 1996 in illegal states), including 111 monozygotic pairs discordant for residence.

Measurements

Current cannabis use frequency (measured continuously and ordinally) was the primary outcome, and the predict

SUBMITTER: Zellers SM 

PROVIDER: S-EPMC10086942 | biostudies-literature | 2023 Jan

REPOSITORIES: biostudies-literature