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Risk factors for current e-cigarette use at age 19 years, analysed in an adjusted logistic regression analysis (including all factors listed in the figure) with the result 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; HRQoL, health-related quality of life.
