title: [Sleeping habits and sleep disorders during adolescence: relation to school performance].
abstract: OBJECTIVE
  To determine the prevalence of sleep disorders in adolescence. To describe sleeping habits of adolescents in relation to sleep disorders and associated factors. To determine the relation between sleep disorders/inappropiate sleeping habits and school performance.
  
  
  METHODS
  Observational, descriptive, cross-sectional study.
  
  
  METHODS
  Secondary school of Cuenca (city in Spain).
  
  
  METHODS
  1293 school children of first and fourth curses of secondary education.
  
  
  METHODS
  Structured questionnaire with opened and closed questions on sleeping habits during weekdays and at weekends and sleep disorders to be answered by the adolescents anonymously and on their own. Student's school performance with relation with to sleeping habits and sleep disorders were determined.
  
  
  RESULTS
  1155 students out of 1293 (response rate 89.33%) answered the questionnaire, 537 (45.9%) boys and 618 (54.1%) girls, 14 years old on average (between 11-18 years). On weekdays students went to bed at 23.17 h and got up at 7.46 h (average sleeping time =8 hours and 18 minutes). At weekends they went to bed at 1.02 h and got up at 10.42 h (average sleeping time =9 hours and 40 minutes). 45.4% of students said to sleep badly on Sunday night's. On average the number of subjects failed in class is higher with adolescents who complain about sleep (2.28 vs 1.91; P=.04), who are tired at waking up time (2.17 vs 1.97; P=.048) and who have morning sleepiness (2.17 vs 1.75; P=.004).
  
  
  CONCLUSIONS
  Schools hours cause deficit sleeping time during weekdays which is partly made up for at weekend. At weekends there is an interruption of the adolescent's sleeping habits. School performance of adolescents with sleep disorders is lower.
authors.affiliation: Unidad Docente de Medicina de Familia y Comunitaria. Gerencia de Atención Primaria de Cuenca. Cuenca. España. fsalcedo@sescam.org
authors.forename: F
authors.initials: F
authors.lastname: Salcedo Aguilar
authors.forename: F M
authors.initials: FM
authors.lastname: Rodríguez Almonacid
authors.forename: M L
authors.initials: ML
authors.lastname: Monterde Aznar
authors.forename: M A
authors.initials: MA
authors.lastname: García Jiménez
authors.forename: P
authors.initials: P
authors.lastname: Redondo Martínez
authors.forename: A I
authors.initials: AI
authors.lastname: Marcos Navarro
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D002648:Child; D003430:Cross-Sectional Studies; D004521:Educational Measurement; D005260:Female; D006184:Habits; D006801:Humans; D008297:Male; D012574:Schools / Q000706:statistics & numerical data; D012893:Sleep Wake Disorders / Q000453:epidemiology*; D013030:Spain / Q000453:epidemiology; D011795:Surveys and Questionnaires