title: Characteristics of sleep in socially vulnerable adolescents.
abstract: OBJECTIVE
  This study may help understand the effects of an unfavorable environment in sleep quality of adolescents.
  
  
  OBJECTIVE
  To investigate sleep quality in socially vulnerable adolescents, correlating the results with cognitive problems and attention deficit/hyperactivity disorder, and assessing the effectiveness of sleep hygiene and an educational intervention.
  
  
  METHODS
  Cross-sectional and interventional study.
  
  
  METHODS
  an educational charitable center supported by a Catholic institution, in Porto Alegre, southern Brazil.
  
  
  METHODS
  125 male and female high school students.
  
  
  METHODS
  As first step the subjects were administered specific questionnaires, the Pittsburgh Sleep Quality Index (PSQI) and the Epworth Sleepiness Scale (ESS), followed by an educational activity that was combined with an unblinded, randomized interventional study. Next, a cross-sectional study was conducted to determine the influence of cognition and ADHD on the sleep.
  
  
  METHODS
  Sleep was evaluated using PSQI and ESS. Cognitive assessment was based on the Wechsler Abbreviated Scale of Intelligence and ADHD by a clinical interview the Multimodal Treatment Study for ADHD (MTA-SNAP-IV).
  
  
  RESULTS
  The average duration of sleep per night were 6 h 30 m. 80% of the sample presented sleep complains. Of these, 44% had excessive daytime sleepiness and 69.6% had poor sleep quality related to use of electronic media, environmental violence, and emotional issues. There were no significant associations between sleep problems and cognitive problems or ADHD. Sleep quality improved in 17% of the 53 students with previous sleep complains who participated in any of the two interventions.
  
  
  CONCLUSIONS
  A high prevalence of sleep deprivation and sleep complains was found in the study sample. The interventions showed some positive effects on the improvement of sleep quality.
authors.affiliation: Graduate Program of Medicine and Health Sciences, Pontificia Universidade Católica do Rio Grande do Sul, Brazil. Electronic address: lisiepolita@hotmail.com.
authors.forename: Lisie Polita
authors.initials: LP
authors.lastname: Romanzini
authors.affiliation: Graduate Program of Medicine and Health Sciences, Pontificia Universidade Católica do Rio Grande do Sul, Brazil. Electronic address: dra.alinesantos@terra.com.br.
authors.forename: Aline Ávila
authors.initials: AÁ
authors.lastname: Dos Santos
authors.affiliation: School of Medicine and Brain Institute (BraIns), Pontificia Universidade Católica do Rio Grande do Sul (PUCRS), Porto Alegre, RS, Brazil. Electronic address: nunes@pucrs.br.
authors.forename: Magda Lahorgue
authors.initials: ML
authors.lastname: Nunes
mesh_terms: D000293:Adolescent; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012890:Sleep; D012893:Sleep Wake Disorders / Q000453:epidemiology / Q000628:therapy; D011795:Surveys and Questionnaires; D035862:Vulnerable Populations
keywords: ADHD; Adolescence; Cognition; Sleep; Sleep disorders; Social inequity