enquête (3) Health surveys (3) adolescent (3) enfant (2) Children (2) World health (2) Swiss (2) Students--Health and hygiene (2) Students (2) Obesity in children (2) Obesity (2) Human beings (2) Age (2) Students (2) poids (1) temps (durée) (1) télévision (1) norme (1) établissement scolaire (1) recherche (1) région (1) association (1) mode de vie (1) information (1) âge (1) comparaison (1) Suisse (1) Comparison (1) Thresholds (Doorsills) (1) Methods (1)