Figure 4.

Risk factors for current e-cigarette use at age 19 years among the teenagers who were never smokers and did not use snus at age 14–15 years, analysed in an adjusted logistic regression analysis (including all factors listed in the figure) with the results expressed as ORs with 95% CIs. *Entered as a continuous variable (score 0–4); **upper secondary education, reference category: preparatory education. E-cigarette, electronic cigarette.