A difference‐in‐difference approach to examining the impact of cannabis legalization on disparities in the use of cigarettes and cannabis in the United States, 2004–17

• DOI: 10.1111/add.15795
• Publication Date: 2022-01-05T10:15:12Z
• Authors: Andrea H. Weinberger; Katarzyna Wyka; June H. Kim; Rosanna Smart; Michael Mangold; Ellen Schanzer; Melody Wu; Renee D. Goodwin
• Keywords: Legalization

To estimate the impact of recreational and medical cannabis laws (RCL, MCL) on use cigarettes in United States.A difference-in-difference approach was applied to data from 2004-17 National Survey Drug Use Health (NSDUH).United States.Nationally representative cross-sectional survey Americans aged 12 years older (combined analytical sample for 2004-17, n = 783 663).Data past-month (1) (2) were used classify respondents into four groups: cigarette co-use, cigarette-only use, cannabis-only or no use. State residence measured by self-report. MCL/RCL status came state government websites.Difference-in-difference analyses suggest that MCL associated with an increase cigarette-cannabis co-use overall [adjusted odds ratio (aOR) 1.09; 95% confidence interval (CI) 1.02-1.16], greatest increases among those 50 above (aOR 1.60; CI 1.39-1.84), married 1.19; 1.07-1.31), non-Hispanic (NH) black 1.14; 1.02-1.07) a college degree 1.15; 1.06-1.24). 1.07; 1.01-1.14) NH 1.16; 1.06-1.27) 1.24; 1.07-1.44) widowed/divorced/separated 1.18; 1.01-1.37). RCL 1.21; 1.09-1.34), decline 0.89; 0.81-0.97) who 1.02-1.50) 1.37; 1.03-1.84).Recreational legalization have had varying States.