Perceived parental reactions to substance use among adolescent vapers compared with tobacco smokers and non-users in Iceland.

•A total of 13.6% of study participants were current vapers and non-smokers.•Electronic cigarette (EC)-only users were more likely than non-smokers to have tried other substances.•Perceived parental reaction to substance use was highest for non-users.•Perceived parental reaction to substance use was lower for vapers than non-users.•Perceived parental reaction to substance use was lower for smokers than vapers.