title: [Survey on prevalence of 1 526 children with sleep disturbances in age of 2 to 12 years old in Chengdu].
abstract: OBJECTIVE
  To find out the prevalence of sleep disturbances for children aged 2 to 12 years old in Chengdu.
  
  
  METHODS
  Totally 1 600 children aged 2-12 years old were selected from 5 districts in Chengdu and investigated by using questionnaire.
  
  
  RESULTS
  All 1 526 survey papers were returned. The average time of every day sleep in each age group (infant group, pre-school age group and school age group) were 12.12 hours, 10.42 hours and 9.47 hours. The sleep time of the children in those three groups were much less than the standard one. The proportion of the prevalence of sleep disturbance was 37.88%. Among them, there were snoring in 5.57%, choke/gargling in 1.25%, sleep inquietude in 7.86%, mouth breathing in 4.59%, sweating in 21.36%, member spasm in 2.82%, molar teeth in 8.26%, night talking in 4.02%, somnambulate in 0.2%, bedwetting in 1.95%, and difficulty falling asleep in 10.75%. There were significant differences shown in different sexes and ages, and in incidence of symptoms of some sleep disturbances. The affecting factors were the co-sleeping, tonsillitis, bronchitis, pollen allergy and their parent's snore.
  
  
  CONCLUSIONS
  The prevalence of sleep disturbances being higher and more severe than before might be due to the less sleeping time in Chengdu in children aged 2 to 12 years old. More attention should be paid by parents, the Ministry of Education and the children's doctors.
authors.affiliation: Department of Children's Health, Chengdu Children's Hospital, Chengdu 610015, China.
authors.forename: Mei
authors.initials: M
authors.lastname: Wang
authors.forename: Li-min
authors.initials: LM
authors.lastname: Zuo
authors.forename: Wen-qi
authors.initials: WQ
authors.lastname: Niu
authors.forename: Ci-lin
authors.initials: CL
authors.lastname: Wang
authors.forename: Ruo-mei
authors.initials: RM
authors.lastname: Xu
authors.forename: Ling-xiu
authors.initials: LX
authors.lastname: Song
authors.forename: Li
authors.initials: L
authors.lastname: Wei
authors.forename: Shu-rong
authors.initials: SR
authors.lastname: Li
mesh_terms: D002648:Child; D002675:Child, Preschool; D002681:China / Q000453:epidemiology; D005260:Female; D006801:Humans; D008297:Male; D015995:Prevalence; D012893:Sleep Wake Disorders / Q000453:epidemiology*; D011795:Surveys and Questionnaires