title: Sociodemographic factors associated with sleep quality and sleep duration in adolescents from Santa Catarina, Brazil: what changed between 2001 and 2011?
abstract: OBJECTIVE
  We aimed to identify and compare the sociodemographic and economic factors associated with perceived sleep quality and sleep duration in high school students from Santa Catarina, Brazil (2001 and 2011).
  
  
  METHODS
  Our study used a school-based, cross-sectional survey administered in 2001 and 2011 to high school students aged 15-19 years (n=5028 in 2001; n=6529 in 2011) enrolled in public schools in Santa Catarina, Brazil.
  
  
  RESULTS
  The students responded to a questionnaire that asked about the number of hours slept on school days (insufficient, <8 h; sufficient, > or = 8 h), perceived sleep quality (adequate or poor), sociodemographic characteristics (gender, age, and area), economic factors (work and family income), and school-related variables (grade and shift). The prevalence of poor sleep quality and insufficient sleep increased by 31.2% and 45.9%, respectively, between 2001 and 2011. Remunerated employment, urban environment, male gender, and high family income were strongly associated with these outcomes.
  
  
  CONCLUSIONS
  There was a notable increase in insufficient sleep and the perception of poor sleep quality among the students in Santa Catarina in the last decade. Public policies are needed to ameliorate this situation, which has disastrous consequences for the health of adolescents.
authors.affiliation: Graduate Program in Physical Education, Federal University of Santa Catarina, Brazil; Physical Activity and Health Research Group (NuPAF), Federal University of Santa Catarina, Cidade Universitária, Trindade 88040970, Brazil. Electronic address: luanapeter@yahoo.com.br.
authors.forename: Luana Peter
authors.initials: LP
authors.lastname: Hoefelmann
authors.forename: Adair da Silva
authors.initials: Ada S
authors.lastname: Lopes
authors.forename: Kelly Samara
authors.initials: KS
authors.lastname: da Silva
authors.forename: Pablo
authors.initials: P
authors.lastname: Moritz
authors.forename: Markus Vinicius
authors.initials: MV
authors.lastname: Nahas
mesh_terms: D000293:Adolescent; D001938:Brazil / Q000453:epidemiology; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012424:Rural Population / Q000706:statistics & numerical data; D012574:Schools; D012890:Sleep; D012893:Sleep Wake Disorders / Q000191:economics / Q000453:epidemiology*; D012931:Social Environment; D012959:Socioeconomic Factors; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D013997:Time Factors; D014505:Urban Population / Q000706:statistics & numerical data; D055815:Young Adult
keywords: Adolescents; Brazil; Demographic indicators; Epidemiology; Panel study; Sleep