title: [Physical activity, screen time, and use of medicines among adolescents: the 1993 Pelotas (Brazil) birth cohort study].
abstract: This study aimed to evaluate cross-sectional and longitudinal associations between physical activity, screen time, and use of medicines among adolescents from the 1993 Pelotas (Brazil) birth cohort study, followed at 11 (N = 4,452), 15 (N = 4,325), and 18 years of age (N = 4,106). The study recorded the use of medicines in the previous 15 days, continuous use of some medication, level of physical activity (by questionnaire and accelerometry), and screen time (TV, computer, and videogame). One-third of adolescents had used at least one medicine in the previous 15 days and approximately 10% were on some continuous medication. In the adjusted analysis, the results showed that higher levels of physical activity at 18 years and less screen time at 15 years in boys were associated with lower overall use of medicines (p < 0.05). For boys, physical activity at 11 and 18 years were inversely related to continuous medication (p < 0.05). More physically active boys and those with less screen time in adolescence showed lower use of medicines at 18 years of age.
authors.affiliation: Universidade Federal do Pampa, Uruguaiana, Brazil.
authors.forename: Gabriel Gustavo
authors.initials: GG
authors.lastname: Bergmann
authors.affiliation: Universidade Federal de Pelotas, Pelotas, Brazil.
authors.forename: Andréa Dâmaso
authors.initials: AD
authors.lastname: Bertoldi
authors.affiliation: Universidade Federal de Pelotas, Pelotas, Brazil.
authors.forename: Grégore Iven
authors.initials: GI
authors.lastname: Mielke
authors.affiliation: Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil.
authors.forename: Aline Lins
authors.initials: AL
authors.lastname: Camargo
authors.affiliation: Universidade de São Paulo, São Paulo, Brazil.
authors.forename: Alicia
authors.initials: A
authors.lastname: Matijasevich
authors.affiliation: Universidade Federal de Pelotas, Pelotas, Brazil.
authors.forename: Pedro Curi
authors.initials: PC
authors.lastname: Hallal
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001938:Brazil; D002648:Child; D003201:Computers / Q000706:statistics & numerical data*; D003430:Cross-Sectional Studies; D015444:Exercise; D005260:Female; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009043:Motor Activity; D004364:Pharmaceutical Preparations / Q000008:administration & dosage*; D057185:Sedentary Behavior; D012737:Sex Factors; D013690:Television / Q000706:statistics & numerical data*; D018910:Video Games
chemical_list: D004364:Pharmaceutical Preparations