Disparities in trajectories of cigarette and E-cigarette use across sexual orientation groups of young adult men and women in the US

Introduction: Limited research has examined differences in cigarette/e-cigarette use trajectories among specific subgroups of sexual minority (SM) young adult (SMYA) men and women.

Methods: Repeated measures latent profile analyses (RMLPAs) examined past 6-month cigarette and e-cigarette use trajectories across 5 waves of data (2018-2020) among men (n = 1235; M_age = 25.56, SD = 4.85; 8.0% bisexual, 12.7% gay; 36.4% racial/ethnic minority) and women (n = 1574; M_age = 24.64, SD = 4.72; 23.8% bisexual, 5.9% lesbian; 35.3% racial/ethnic minority) residing in 6 US metropolitan statistical areas. Multinomial logistic regressions examined associations among sexual orientation (bisexual, gay/lesbian, heterosexual) and tobacco use trajectories among men and women, separately.

Results: RMLPAs yielded a 6-profile solution: stable low-level cigarette and e-cigarette use (66.6%), stable low-level cigarette and high-level e-cigarette use (12.2%), stable low-level cigarette and decreasing e-cigarette use (6.2%), stable mid-level cigarette and low-level e-cigarette use (6.2%), stable high-level cigarette and low-level e-cigarette use (4.5%), and stable high-level cigarette and e-cigarette use (4.2%). Gay (vs. heterosexual) men were less likely to display stable low-level cigarette and stable high-level e-cigarette use. Bisexual (vs. heterosexual) women were more likely to display stable low-level cigarette and stable high-level e-cigarette use, stable low-level cigarette and decreasing high-level e-cigarette use, and stable high-level cigarette and stable low-level e-cigarette use.

Conclusions: Bisexual women were at greatest risk for displaying several problematic cigarette and e-cigarette use trajectories, whereas few differences emerged for men. Tailored interventions and campaigns are needed to curtail ongoing tobacco use disparities among SMYA men and women, particularly bisexual women.