title: [Factors associated with short sleep duration in adolescents].
abstract: OBJECTIVE
  This study aimed to investigate the prevalence and factors associated with short sleep duration in adolescents from Maravilha - Santa Catarina (SC), southern Brazil.
  
  
  METHODS
  The sample consisted of 516 adolescents aged 10-19 years of both genders. Issues associated with short sleep duration and difficulty falling asleep, chronotype, daytime sleepi-ness, physical activity, sedentary behavior and weight status were investigated.
  
  
  RESULTS
  The prevalence of short sleep duration (<8h on school days) was 53.6%. Adolescents aged 17-19 years showed a 2.05-fold (95%CI: 1.20-3.50) greater prevalence of short sleep duration than those aged 10-12 years. The ones studying in morning and evening shifts had a higher prevalence of short sleep duration compared to those in the afternoon shift. Older age and school shift were the main factors associated with short sleep duration.
  
  
  CONCLUSIONS
  Adolescents from Maravilha showed high prevalence of short sleep duration, and older adolescents that studied in the morning and evening shifts showed reduced sleep.
authors.affiliation: Universidade do Estado de Santa Catarina (Udesc), Florianópolis, SC, Brasil. Electronic address: ericofelden@gmail.com.
authors.forename: Érico Pereira Gomes
authors.initials: ÉP
authors.lastname: Felden
authors.affiliation: Universidade do Estado de Santa Catarina (Udesc), Florianópolis, SC, Brasil.
authors.forename: Douglas
authors.initials: D
authors.lastname: Filipin
authors.affiliation: Universidade do Estado de Santa Catarina (Udesc), Florianópolis, SC, Brasil.
authors.forename: Diego Grasel
authors.initials: DG
authors.lastname: Barbosa
authors.affiliation: Universidade do Estado de Santa Catarina (Udesc), Florianópolis, SC, Brasil.
authors.forename: Rubian Diego
authors.initials: RD
authors.lastname: Andrade
authors.affiliation: Universidade do Estado de Santa Catarina (Udesc), Florianópolis, SC, Brasil.
authors.forename: Carolina
authors.initials: C
authors.lastname: Meyer
authors.affiliation: Universidade Federal do Paraná (UFPR), Curitiba, PR, Brasil.
authors.forename: Fernando Mazilli
authors.initials: FM
authors.lastname: Louzada
mesh_terms: D000293:Adolescent; D000367:Age Factors; D001938:Brazil; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D012574:Schools; D012890:Sleep / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000209:etiology*; D011795:Surveys and Questionnaires; D013997:Time Factors; D055815:Young Adult
keywords: Adolescentes; Adolescents; Habits; Hábitos; Saúde escolar; School health; Sleep; Sono