This aim of this paper is to determine the relationship between the consumption of tobacco, cannabis, and alcohol (including drunkenness and binge drinking consumption patterns) in the previous 30 days by Spanish adolescents and the information that is available to adolescents on drug consumption. This cross-sectional study employed data from the Survey on Drug Use in Secondary Education in Spain (ESTUDES 2016), which was conducted on students aged 14 to 18 (n = 35,369). Contingency tables, mean comparison tests, and logistic regression analyses were conducted and prevalence ratios (PR) were obtained. The results show that the probability that an adolescent will smoke tobacco is associated with whether their mother and/or father smoke (PR: 1.30), whether some of their friends smoke (PR: 14.23), whether the majority of their friends smoke (PR: 94.05) and how well informed they perceive themselves to be (PR: 1.30). Cannabis use is mainly associated with whether most of their friends also use cannabis (PR: 93.05) and whether they are sufficiently informed regarding this consumption (PR: 1.59). Alcohol consumption is associated with whether their mothers drink regularly (PR: 1.21), whether most of their friends drink (PR: 37.29), and whether they are well informed (PR: 1.28). Getting drunk and binge drinking are associated with whether their friends have these behaviors (PR: 44.81 and 7.36, respectively) and whether they are sufficiently informed (PR: 1.23 for both behaviors). In conclusion, the consumption of these substances is more frequent among Spanish adolescents who believe that they are better informed and whose friends have similar patterns of consumption.

This paper analyses compulsive Internet use among Spanish adolescents as measured by the Compulsive Internet Use Scale (CIUS) of the ESTUDES 2016 survey (national survey on drug use in secondary schools), which was recently added to the statistical programme of the Spanish National Plan on Drugs. We examined two subsamples of Spanish adolescents (those who suffer from compulsive Internet use and those who do not) while taking into account gender and age. Our general hypothesis was that adolescents who suffer from compulsive Internet use have a greater prevalence of alcohol, tobacco, cannabis, sedative, and new substance consumption as well as a greater prevalence of modes of consumption such as getting drunk, drinking with friends in public places (botellón), and binge drinking. While our results confirm these assumptions, they also suggest that gender and age play an ambivalent role in these associations.

Background: There are a wide number of assessments suggesting that being a member of a religious community inhibits adolescents’ risky behaviours and, consequently, can act as a protective factor against the consumption of smoking substances. Methods: We have analysed a structured questionnaire answered by 1935 adolescents from Tarragona (Spain). Results: We have found that variables linked to family were the principal explanatory factors of adolescents’ smoking habits. Living with two parents was a protective factor against tobacco and cannabis use since its Incidence Rate Ratio (IRR) was clearly below 1 (p<0.01). So, whereas living with one parent showed an IRR>1 (p<0.05), adolescents that live without parents presented an IRR close 2 (p<0.05 for tobacco and p<0.01 for cannabis). However, having a religious confession also influence smoking substance use in adolescents (IRR close 0.85 with p<0.01). Conclusion: We found a clear preventive effect in belonging to a religious community. Moreover, this protective effect was less intense, but not statistically significant, for Catholics than for members of other confessions.