BackgroundA wide range of electronic cigarettes (e-cigarettes) are now on the market. We studied e-cigarette awareness and use, determinants and sources of e-cigarettes, the e-liquids used in them and exposure to e-cigarette advertisements among adolescents in Finland. Among smokers, we studied the association of e-cigarette use and interest in smoking cessation.MethodData were obtained from a national survey of 12–18-year-old Finnish adolescents in 2013 (N=3535, response rate 38%). Descriptive statistics and logistic regression analysis were used.ResultsOf the respondents, 85.3% knew what e-cigarettes were; 17.4% had tried them. E-liquids with nicotine were used most often (65.7%); also those who had never tried conventional cigarettes had used them. Of e-cigarette ever users, 8.3% had never tried smoking. Parents’ high level of education, being in employment, and intact family protected against children's e-cigarette use. In the final model, daily smoking (OR 41.35; 95% CI 25.2 to 67.8), snus use (2.96; 2.4–4.0), waterpipe use (2.21; 1.6–3.0), children's vocational education (2.06; 1.4–3.1) and poor school performance (1.92; 1.4–3.0) were associated with e-cigarette experimentation. Those smokers with most experience of e-cigarettes were least likely to consider smoking cessation.ConclusionsAwareness and experimentation with e-cigarettes are high among adolescents, especially in older age groups and boys. Nicotine e-liquids are easy to acquire for youth. Having similar risk factors, e-cigarette use seems to follow the model of conventional smoking initiation. Among adolescent smokers, use of e-cigarettes does not clearly relate to interest in smoking cessation. Preventive policies are needed to protect the youth.

Tobacco use by parents, teachers and friends was associated with adolescents' tobacco habits. The influence of friends was the strongest. In developing programmes against adolescents' tobacco habits, there is need to target the influence of these 'significant others'. Sudan needs to develop and implement comprehensive anti-smoking and anti-tombak dipping legislation to reduce the growing prevalence of such habits.

The influence of parents’ smoking on children’s smoking is well known, but few studies have examined the association between grandparents’ and grandchildren’s smoking. We studied the association between paternal and maternal grandparents’ smoking and their grandchildren’s tobacco use and assessed whether parents’ smoking is a mediator in this process. Data were obtained from a national survey of 12–18-year-old Finns in 2013 (N = 3535, response rate 38%). Logistic regression and mediation analyses were used. Both boys and girls had higher odds for smoking experimentation, daily smoking and other tobacco or tobacco-like product use if their mother, father or any of the four grandparents were current or former smokers. When parents’ and grandparents’ smoking status were included in the same model, grandparents’ smoking generally lost statistical significance. In the mediation analysis, 73% of the total effect of grandparents’ smoking on grandchildren’s daily smoking was mediated through parents’ smoking, 64% on smoking experimentation and 63% on other tobacco or tobacco-like product use. The indirect effect of a mother’s smoking was higher than that of a father’s. To conclude, paternal and maternal grandparents’ smoking increases grandchildren’s tobacco use. The influence is mainly, but not completely, mediated through parents’ smoking.

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During the recent years, new tobacco and tobacco-like products, e.g., e-cigarettes, have emerged on the market. Adolescents often underestimate health risks in general, including those concerning tobacco. Little is known of adolescents’ perceptions of health risks of the newer products. Our paper compares adolescents’ perceptions of harmfulness of cigarettes, e-cigarettes, snus, water pipes, and nicotine in Finland, a country with a long history of strict tobacco control policy. Online surveys to nationally representative samples of 12–18-year-olds were conducted in 2017 and 2019, with 7578 answering the surveys. Only 3% of boys and 2% of girls did not agree that cigarettes are harmful to health. The percentages were slightly higher for snus (6% and 3%, respectively) and nicotine (12%, 8%) but much higher for e-cigarettes (30%, 22%) and water pipes (36%, 38%). Those who used the product, whose parents were smokers or had lower education, and whose school performance was lower, less often agreed with the harmful health effects of the products. Our results showed that adolescents understood the harmfulness of older tobacco products better than the harmfulness of the newer ones. Our results also showed the need to strengthen health education and fix adolescents’ misperceptions of the health effects of the newer products.