enquête (2) recherche (2) analyse (2) Teenagers (2) Research (2) Multivariate analysis (2) Research (2) Analysis (2) poids (1) tabac (1) norme (1) établissement scolaire (1) projet (1) association (1) participation (1) surveillance (1) santé (1) alcool (1) effet (1) consommation (1) âge (1) Economic conditions (1) Monitoring (1) Control (1) Rules (1) Rules (1) Bullying (1) Peer pressure (1) Tobacco (1) Swiss (1)