A Longitudinal Study of Electronic Cigarette Use and Onset of Conventional Cigarette Smoking and Marijuana Use Among Mexican Adolescents

Drug Alcohol Depend. 2017 Nov 1;180:427-430. doi: 10.1016/j.drugalcdep.2017.09.001. Epub 2017 Sep 28.

Abstract

Purpose: This study evaluated whether e-cigarette trial among Mexican adolescents increased the likelihood of trial and use of conventional cigarettes or marijuana use at follow-up.

Method: A school-based longitudinal survey was conducted in 60 public middle schools from the three largest cities in Mexico. Students (12-13years old) were surveyed in 2015 and followed up 20 months later (n=6574). Generalized estimating equations models were used to evaluate the association between e-cigarette trial at baseline and conventional cigarettes smoking and marijuana use at follow-up.

Result: Adolescents who had tried e-cigarettes (but not cigarettes) at baseline were more likely to have tried conventional cigarettes at followup compared to adolescents who had tried neither e-cigarettes nor cigarettes (43% vs. 24%, respectively; RR 1.41, 95% CI 1.18-1.70). We also found that adolescents who had tried both conventional cigarettes and e-cigarettes at baseline were more likely to have tried marijuana at follow-up compared to adolescents who had tried neither tobacco product (20% vs. 4%, respectively; RR 2.67, 95% CI 1.78-4.02). Trial of only e-cigarettes was not independently associated with marijuana use at followup.

Conclusions: Adolescents who had tried e-cigarettes were more likely to have tried conventional cigarettes and marijuana 20 months later. Although e-cigarettes have been banned in Mexico, it is likely that additional policies and public health campaigns are needed to reduce adolescent use of e-cigarettes and its consequences.

Keywords: Adolescents; Electronic cigarettes; Marijuana; Mexico; Trial.

MeSH terms

  • Adolescent
  • Cigarette Smoking / epidemiology*
  • Electronic Nicotine Delivery Systems / statistics & numerical data*
  • Humans
  • Longitudinal Studies
  • Marijuana Abuse / psychology*
  • Mexican Americans
  • Mexico
  • Students / statistics & numerical data*
  • Surveys and Questionnaires