établissement scolaire (2) région (2) âge (2) Methods (2) Teenagers (2) Students (2) Sex (2) Holy Cross (2) Ericas (2) Confidence intervals (2) Age (2) Methods (2) Age (2) Students (2) adolescent (2) enquête (1) risque (1) santé (1) épidémiologie (1) éducation (1) eau potable (1) abords (agglomération) (1) Brésil (1) Education (1) Epidemiology (1) Food (1) Control (1) Prevention (1) Weights and measures (1) Water (1)