Uptake of e-cigarettes among a nationally representative cohort of UK children

Using nationally representative data this study examined experimentation with and regular use of e-cigarettes among children not using tobacco at age 11 years, followed up to age 14 years.

Data come from 10 982 children in the UK Millennium Cohort Study. Logistic regression assessed experimentation with and current use of e-cigarettes by age 14 years. We considered associations of sociodemographics at age 11 years with subsequent e-cigarette use, including data on family income, peer and caregiver smoking. Subsequent models were adjusted for current tobacco use to assess both the strength of the assocations between e-cigarette use and tobacco, and whether sociodemographics were associated with e-cigarettes independently of tobacco.

Among 10 982 children who reported never smoking at age 11 years, 13.9% (1525) had ever tried an e-cigarette by age 14 years, and of these 18.2% (278) reported being current users. Children in lower income households were more likely to have tried an e-cigarette than those in higher income households (Adjusted Odds Ratio, AOR 1.89, p=0.002). Children who reported friend (AOR 2.28, p<0.001) or caregiver smoking (AOR 1.77, p<0.001) at age 11 years were more likely to have tried an e-cigarette by age 14 years. After adjusting for current tobacco use, there was some attenuation of these associations, although associations of friend and caregiver smoking with e-cigarette use remained statistically significant.

Children from lower income families were more likely to experiment with e-cigarettes by age 14 years, although this was heavily mediated by concurrent tobacco use. Caregiver and friend smoking are linked to trying e-cigarettes, although these relationships are less clear for regular e-cigarette use.