Predictors of intentions to use cigarettes and electronic-cigarettes among high school students.

Purpose: Tobacco is the second most commonly used drug by Spanish high school students and e-cigarette use has increased over the last three years among this population. Students who reported smoking tobacco and/or e-cigarette use often have friends and family that also consume these substances. The aims of the present study were to: determine the prevalence of tobacco and electronic cigarette consumption among young adolescents, the age of initiation and the intention to consume both of these substances in the future; study the relationships between their current tobacco and e-cigarette consumption status, intentions to consume these substances in the future and the consumption of these substances by family members living in their home and friend's consumption status; investigate the relationship between their current tobacco and e-cigarette consumption status, friends' consumption status and their intention to consume each substance in the future; analyse the relationship between current consumption status, intentions to consume in the future and perceived risk; identify the main predictors of intentions to use these substances in the future.

Types of polydrug use among Spanish adolescents.

Objective: This study examined the types of polydrug use among Spanish adolescents.

Method: 1501 high school students (50.6% female) aged 12 to 17years old (mean age=14.