Co-use of Cannabis and Tobacco


  1. Pamela Ling, MD, MPH
Research Fields: 

We are pursuing both qualitative and qualitative behavioral studies of tobacco and cannabis co-use.  I have a longitudinal qualitative study of poly-tobacco and cannabis users in California: 60 young adults (age 18-29 at baseline) who completed 3 annual interviews between 2017 and 2019, and 60 older adults (age 30+) who completed an interview in 2018-19 and will follow up in 2019-20.  While we recruited current users of at least two tobacco products (cigarettes, e-cigarettes, smokeless tobacco) a large number of the participants also use cannabis, and the interviews in wave 2 and wave 3 have substantial discussion of cannabis use, motivations, and comparison to tobacco and vaping products.  The study will provide rich data on the context of changes in behavior over time.  In addition, we are writing a paper describing flavored cannabis use among adults in states with cannabis legalization.  Finally we are conducting a population-based survey of young adults (age 18-29) in the San Francisco and Alameda counties with a sample in 2014 and a follow up in 2019-20.  In addition to the survey data, we are collecting neighborhood audits and retail assessments in tobacco retailers, vape shops and cannabis dispensaries.  This study will give us a view of tobacco and cannabis use and the retail environment before and after cannabis legalization.