title: ERICA: leisure-time physical inactivity in Brazilian adolescents.
abstract: OBJECTIVE To evaluate the prevalence of leisure-time physical inactivity in Brazilian adolescents and their association with geographical and sociodemographic variables. METHODS The sample was composed by 74,589 adolescents participating in the Study of Cardiovascular Risks in Adolescents (ERICA). This cross-sectional study of school basis with national scope involved adolescents aged from 12 to 17 years in Brazilian cities with more than 100 thousand inhabitants. The prevalence of leisure-time physical inactivity was categorized according to the volume of weekly practice (< 300; 0 min). The prevalences were estimated for the total sample and by sex. Poisson regression models were used to assess associated factors. RESULTS The prevalence of leisure-time physical inactivity was 54.3% (95%CI 53.4-55.2), and higher for the female sex (70.7%, 95%CI 69.5-71.9) compared to the male (38.0%, 95%CI 36.7-39.4). More than a quarter of adolescents (26.5%, 95%CI 25.8-27.3) reported not practicing physical activity in the leisure time, a condition more prevalent for girls (39.8%, 95%CI 38.8-40.9) than boys (13.4%, 95%CI 12.4-14.4). For girls, the variables that were associated with physical inactivity were: reside in the Northeast (RP = 1.13, 95%CI 1.08-1.19), Southeast (RP = 1.16, 95%CI 1.11-1.22) and South (RP = 1.12, 95%CI 1.06-1.18); have 16-17 years (RP = 1.06, 95%CI 1.12-1.15); and belong to the lower economic class (RP = 1.33, 95%CI 1.20-1.48). The same factors, except reside in the Southeast and South, were also associated with not practicing physical activity in the leisure time for the same group. In males, as well as the region, being older (p < 0.001) and declaring to be indigenous (RP = 0.37, 95%CI 0.19-0.73) were also associated with not practicing physical activities in the leisure time. CONCLUSIONS The prevalence of leisure-time physical inactivity in Brazilian adolescents is high. It presents regional variations and is associated with age and low socioeconomic status. Special attention should be given to girls and to those who do not engage in any physical activity during the leisure time, so that they can adopt a more active lifestyle.
authors.affiliation: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.
authors.forename: Felipe Vogt
authors.initials: FV
authors.lastname: Cureau
authors.affiliation: Instituto de Estudos em Saúde Coletiva, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Thiago Luiz Nogueira
authors.initials: TL
authors.lastname: da Silva
authors.affiliation: Instituto de Estudos em Saúde Coletiva, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brasil.
authors.forename: Katia Vergetti
authors.initials: KV
authors.lastname: Bloch
authors.affiliation: Departamento de Enfermagem em Saúde Coletiva, Escola de Enfermagem, Universidade de São Paulo, São Paulo, SP, Brasil.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Fujimori
authors.affiliation: Universidade Federal do Amapá, Macapá, AP, Brasil.
authors.forename: Dilson Rodrigues
authors.initials: DR
authors.lastname: Belfort
authors.affiliation: Departamento de Nutrição, Universidade de Brasília, Brasília, DF, Brasil.
authors.forename: Kênia Mara Baiocchi
authors.initials: KM
authors.lastname: de Carvalho
authors.affiliation: Faculdade de Educação Física e Fisioterapia, Universidade Federal do Amazonas, Manaus, AM, Brasil.
authors.forename: Elisa Brosina
authors.initials: EB
authors.lastname: de Leon
authors.affiliation: Escola Nacional de Ciências Estatísticas, Fundação Instituto Brasileiro de Geografia e Estatística, Rio de Janeiro, RJ, Brasil.
authors.forename: Mauricio Teixeira Leite
authors.initials: MT
authors.lastname: de Vasconcellos
authors.affiliation: Department of Sports Medicine, Norwegian School of Sports Science, Oslo, Norway.
authors.forename: Ulf
authors.initials: U
authors.lastname: Ekelund
authors.affiliation: Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brasil.
authors.forename: Beatriz D
authors.initials: BD
authors.lastname: Schaan
mesh_terms: D000293:Adolescent; D001938:Brazil / Q000453:epidemiology; D015444:Exercise; D005260:Female; D006801:Humans; D007899:Leisure Activities; D008019:Life Style; D008297:Male; D057185:Sedentary Behavior; D012959:Socioeconomic Factors; D062206:Spatial Analysis; D011795:Surveys and Questionnaires