title: [Sleep problems among school age children in Chengdu].
abstract: OBJECTIVE
  To identify the sleep patterns and sleep problems in the children of school age in Chengdu. Methods In 2005, 2848 children of school age were randomly selected from five districts in Chengdu to participants in a questionnaire survey. The sleep behaviors of the participants and their determinants were investigated.
  
  
  RESULTS
  The sleeping time decreased with age (P<0.05). More than half of the participants (58.08%) had sleep disorders, which included enuresis (5.65%), sleeptalking (16.15%), sleepinquietude (34.34%), sleepwalking (2.84%), bruxism (22.86%), snoring (10.92%), sleep apnoea (0.77%), decompensation (3.12%), and nightmares (11.76%). The boys had greater prevalence of sleepwalking and snoring than the girls. There was a significant age difference for sleepinquietude and bruxism. The factors that had an impact on the sleep disorders included: after school classes, neuro-medication and foods, exciting activities, depressive moods of mothers or caregivers, and allergic reactions to medicines and foods.
  
  
  CONCLUSIONS
  Sleep deprivations and high prevalence of sleep disorders among the school age children in Chengdu need to be addressed.
authors.affiliation: Pediatric Department, West China Second Hospital, Sichuan University, Chengdu 610041, China.
authors.forename: Fei
authors.initials: F
authors.lastname: Xiong
authors.forename: Fan
authors.initials: F
authors.lastname: Yang
authors.forename: Meng
authors.initials: M
authors.lastname: Mao
authors.forename: Hui-ming
authors.initials: HM
authors.lastname: Yang
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D004775:Enuresis / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D020186:Sleep Bruxism / Q000453:epidemiology*; D012893:Sleep Wake Disorders / Q000453:epidemiology*; D012913:Snoring / Q000453:epidemiology*; D011795:Surveys and Questionnaires