épidémiologie (5) Epidemiology (5) Methods (5) Teenagers (5) Sex (5) Holy Cross (5) Ericas (5) Epidemiology (5) Methods (5) adolescent (5) Brésil (4) Confidence intervals (4) Older people (4) temps (durée) (3) établissement scolaire (3) recherche (3) région (3) âge (3) Weights and measures (3) Time (3) Students (3) Schools (3) Research (3) Private schools (3) Age (3) Research (3) Age (3) Students (3) classe d'âge (3) enquête (2)