摘要：Introduction Twenty-seven percent of adolescents used a nicotine/tobacco product in 2018.Our study analyzed three waves from the Population Assessment of Tobacco and Health (PATH) Study and examined adolescent nicotine/tobacco use trajectories over time to determine which latent classes were associated with symptoms of nicotine dependence.Methods The PATH Study used a four-stage, stratified area probability sample and annual household interviews with adolescents (12–17 years).Adolescents who indicated past 30-day nicotine/tobacco use at least once were included ( n = 1101).We used latent class analysis (LCA) to identify nicotine/tobacco trajectories across three waves of PATH data and their association with six symptoms consistent with nicotine dependence from the Wisconsin Inventory of Smoking Dependence Motives (WISDM-68).Results All types of past 30-day nicotine/tobacco use increased across the three waves.An LCA model fit was assessed using both the CIV and entropy measures in conjunction with the Vuong-Lo-Mendell-Rubin LRT.A five latent class solution had the lowest BIC value (BIC = 9784.272), and resulted in: (1) “Stable/consistent multiproduct use trajectory”, (2) “Increasing cigarette use trajectory”, (3) “Increasing e-cigarette use trajectory”, (4) “Experimental (poly-nicotine/tobacco) use trajectory”, and (5) “Increasing other nicotine/tobacco use trajectory”.The most prevalent was the “Experimental (poly-nicotine/tobacco) use trajectory” (33.8%) although sex, race, and social class were associated with different trajectories.Those represented by the “Increasing cigarette use trajectory” (19.4%) reported significantly more past-year nicotine dependence symptoms (b = 1.73, p < 0.001) compared to the “Increasing e-cigarette use trajectory”.Findings varied by sex and race.Conclusions Results indicate that the relationship between e-cigarette use and other forms of nicotine/tobacco and substance use is complex and that adolescent nicotine/tobacco users are a heterogenous group with different risks for nicotine dependence.Findings can inform tailored prevention education and messaging for different groups of youth.
关键词：E-cigarettes ; Cigarette use ; Adolescent nicotine/tobacco use trajectories ; BIC Bayesian information criterion ; GEE generalized estimating equations ; LCA latent class analysis ; LRT likelihood ratio test ; NYTS National Youth Tobacco Survey ; PATH Study Population Assessment of Tobacco and Health Study ; SD standard deviation ; WISDM-68 Wisconsin Inventory of Smoking Dependence Motives
