Examining sexual identity stability and change over time and associations with tobacco use in a nationally representative US sample

Background: Epidemiologic research has found sexual minority identifying individuals are disproportionately burdened by tobacco use and tobacco use disorder (TUD). However, these studies often conceptualize sexual identity as time-invariant. This study examined sexual identity over time and whether a transition to a sexual minority identity was associated with tobacco outcomes.Methods: This study used data from Waves 1-4 of the Population Assessment of Tobacco and Health (2013/ 14-2016/18) study (adolescents and adults aged >= 14 years; n = 26,553). We examined associations of sexual identity stability and change with changes in the number of tobacco products used and TUD symptoms.Results: Males and females who experienced two or more changes in sexual identity and females who changed from a heterosexual to a sexual minority identity were more likely to have an increase in two or more tobacco products and increase TUD symptoms compared to heterosexual-stable males and females. Gay-stable males were less likely to increase TUD symptoms compared to heterosexual-stable males.Conclusions: Experiencing a change in sexual identity may be a particularly vulnerable period for increases in tobacco products used and TUD. It may be important to provide tobacco use intervention and support resources to individuals coming out as a sexual minority and those fluid in their sexual identity.