TY  - JOUR
PY  - 2020//
TI  - Developmental trajectories of tobacco/nicotine and cannabis use and patterns of product co-use in young adulthood
JO  - Tobacco use insights
A1  - Dunbar, Michael S.
A1  - Davis, Jordan P.
A1  - Tucker, Joan S.
A1  - Seelam, Rachana
A1  - Shih, Regina A.
A1  - D'Amico, Elizabeth J.
SP  - e1179173X20949271
EP  - e1179173X20949271
VL  - 13
IS  - 
N2  - INTRODUCTION: Concurrent co-use of tobacco/nicotine and cannabis (T/C) products is common among young people and may increase risks for negative health and psychosocial outcomes, but little is known about developmental patterns of T/C co-use. This study aimed to identify distinct trajectory classes of concurrent T/C co-use from ages 16 to 21 and compare groups on T/C co-use behaviors in young adulthood.     Methods: Participants (n = 2497) reported T/C use on annual online surveys from 2015 to 2019 (ages 16-22). We used parallel process growth mixture models to model simultaneous trajectories of past-month cigarette, e-cigarette, smokeless tobacco, and cannabis use and identify latent classes of T/C trajectories. Classes were then compared on types and number of T/C products used and types of T/C co-use in young adulthood.     Results: Models revealed 4 T/C classes: Low/No T/C Use, Early Concurrent T/C Co-use, Late Concurrent T/C Co-use, and Tobacco Quitters/Cannabis Maintainers. Compared to other classes, the Early Concurrent T/C Co-use group-individuals with rapid progression to concurrent T/C co-use during adolescence-were more likely to report poly-tobacco use, poly-cannabis use, same-occasion sequential T/C co-use and T/C co-administration (ie, mixing T/C) of both combustible and vaping products in young adulthood.     Conclusion: Early progression to concurrent T/C co-use in adolescence is prospectively linked to poly-product use and co-use of T/C products in young adulthood. Prevention efforts targeting co-use of T/C products in adolescence may help to reduce riskier patterns of T/C use and co-use in young adulthood.<p />  <p>Language: en</p>
LA  - en
SN  - 1179-173X
UR  - http://dx.doi.org/10.1177/1179173X20949271
ID  - ref1
ER  -