Association between age at first reported e-cigarette use and subsequent regular e-cigarette, ever cigarette and...

Area of Science:

• Adolescent health
• Public health
• Tobacco control research

Background:

• The association between electronic cigarette use and subsequent smoking is well-documented.
• However, the specific impact of the age of first e-cigarette use on later smoking initiation remains less understood.
• This study addresses this gap by examining early versus late e-cigarette initiation.

Purpose of the Study:

• To investigate the differences in regular and ever use of e-cigarettes and cigarettes among adolescent never-smokers.
• To compare early e-cigarette users (13-14 years) with late users (14-15 years) and never users.
• To determine the effect of controlling for covariates on these associations.

Main Methods:

• A prospective study followed 3289 never-smoker adolescents (13-14 years) in England over 12 and 24 months.
• Participants were categorized into early e-cigarette users, late e-cigarette users, and never users.
• Self-reported regular e-cigarette and cigarette use, and ever cigarette use at 15-16 years were assessed, with covariates controlled.

Main Results:

• Early and late e-cigarette users were significantly more likely than never users to become regular e-cigarette users, ever cigarette users, and regular cigarette users.
• Late users showed significantly lower rates of ever cigarette use compared to early users at age 15-16.
• These findings remained consistent even after controlling for covariates.

Conclusions:

• Adolescents initiating e-cigarette use at a younger age (13-14 years) exhibit higher subsequent rates of cigarette initiation.
• The observed difference between early and late users may be attributed to a longer window of opportunity for cigarette initiation in younger users.
• Findings underscore the importance of early intervention to prevent adolescent smoking uptake.