How does state marijuana policy affect US youth? Medical marijuana laws, marijuana use and perceived harmfulness: 1991-2014.

ABSTRACT:

Aims

To test, among US students: (1) whether perceived harmfulness of marijuana has changed over time, (2) whether perceived harmfulness of marijuana changed post-passage of state medical marijuana laws (MML) compared with pre-passage; and (3) whether perceived harmfulness of marijuana statistically mediates and/or modifies the relation between MML and marijuana use as a function of grade level.

Design

Cross-sectional nationally representative surveys of US students, conducted annually, 1991-2014, in the Monitoring the Future study.

Setting

Surveys conducted in schools in all coterminous states; 21 states passed MML between 1996 and 2014.

Participants

The sample included 1 134 734 adolescents in 8th, 10th and 12th grades.

Measurements

State passage of MM

SUBMITTER: Keyes KM 

PROVIDER: S-EPMC5222836 | biostudies-literature | 2016 Dec

REPOSITORIES: biostudies-literature