Simultaneous alcohol and marijuana use among young adult drinkers: Age-specific changes in prevalence from 1977-2016

摘要

Background:The overall prevalence of United States young adult alcohol use has decreased, but less is known about historical change in related behaviors such as simultaneous alcohol and marijuana (SAM) use that may increase alcohol-related risks and societal costs. The purpose of this paper is to examine historical change in SAM use prevalence among U.S. young adult alcohol users from 1977–2016, and consider the extent to which observed historical change in SAM use among alcohol users reflects co-occurring change in marijuana use during these years.