Danielle E. Ramo|Kevin Delucchi|Sharon M. Hall|Howard Liu|Judith J. Prochaska
Marijuana and Tobacco Co-Use in Young Adults: Patterns and Thoughts About Use
University of California, San Francisco|University of California, San Francisco|University of California, San Francisco|University of California, San Francisco|Stanford University
objective examined frequency intensity tobacco use thoughts abstinence among young adults united states function use marijuana hypothesized heavier marijuana use would associated heavier tobacco use fewer attempts quit smoking explored relationships marijuana use ratings intentions thoughts related quitting tobacco method crosssectional survey consisting online recruitment anonymous selfreport participants english literate ages 18 25 years reported pastmonth tobacco use half 53 smoked marijuana past 30 days tobacco use quantityfrequency heavy smoking index pastyear quit attempt thoughts tobacco use outcome expectancies desire selfefficacy difficulty quitting abstinence goal pros cons stage change alcohol use drug use assessed results compared smoked tobacco cousers younger smoked fewer years higher household income likely male multiethnic nondaily smokers reported greater alcohol drug use variable days using marijuana past 30 days associated multiple measures tobacco use intensityfrequency one association significant marijuana use tobaccorelated cognitions cousers lower likelihood planning quit tobacco good odds ratio 075 95 ci 058 098 conclusions findings support association tobacco marijuana use among young people speak importance addressing tobacco cognitions young adult smokers regardless level marijuana use