Age-varying associations between e-cigarette use and peer use, household use, and exposure to e-cigarette commercials among alternative high school students in Southern California.

Introduction:
This text is a research paper that examines the age-varying associations between e-cigarette use and peer use, household use, and exposure to e-cigarette commercials among alternative high school students in Southern California. The study uses data previously collected for a tobacco marketing study and time-varying effect modeling (TVEM) to analyze the data.

Key Points:

* The study examines the age-varying associations between e-cigarette use and peer use, household use, and exposure to e-cigarette commercials among alternative high school students in Southern California.
* The study uses data previously collected for a tobacco marketing study and time-varying effect modeling (TVEM) to analyze the data.
* The study finds that the probability of e-cigarette use gradually increased over the age of 15 years and then decreased by the age of 17 years for females and after the age of 18 years for males.
* Significant gender differences were observed between the ages of 17 and 19.5 years.
* Peer e-cigarette use was associated with higher odds of current e-cigarette use across all ages for females and after the age of 16 years for males.
* Exposure to e-cigarette commercials increased current use significantly for males between the ages of 16 and 18 years.
* Household use increased the odds of current use of e-cigarettes between the ages of 17 and 19 years for males and under 16.5 and over 18 years for females.

Main Message:
The study highlights the utility of TVEM in understanding the risk factors of e-cigarette use and suggests that these factors are dynamic across adolescence. The findings suggest that interventions to prevent e-cigarette use among at-risk adolescents should take into account the age-varying associations between e-cigarette use and peer use, household use, and exposure to e-cigarette commercials. Additionally, the study emphasizes the need for further research on the dynamics of social network predictors for alternative nicotine products, such as e-cigarettes, among alternative high school students.

Etim N, Pike J, Xie B. Age-varying associations between e-cigarette use and peer use, household use, and exposure to e-cigarette commercials among alternative high school students in Southern California. Tobacco induced diseases. 2020;18:7. doi:10.18332/tid/116412