title: [Prevalence of central sleep apnea in different age groups of children with sleep apnea-hypopnea].
abstract: OBJECTIVE
  To explore the prevalence of central sleep apnea in different age groups of children with sleep apnea-hypopnea (SAH).
  
  
  METHODS
  A total of 431 children with SAH diagnosed by overnight polysomnography at our Sleep Center were retrospectively studied. They were divided into 3 groups based on their ages: toddler group (1 - < 3 years old), preschool group (3 - < 6 years old) and school group (6 - < 13 years old). The relationship between age and different types of apnea-hyponea index (AHI) was analyzed. And the prevalence of central sleep apnea and sleep structure were compared between the groups.
  
  
  RESULTS
  A negative correlation existed between age and central sleep apnea index (r = -0.322, P < 0.01). However, there was no correlation between age and obstructive apnea index (P > 0.05). AHI was similar in different age groups, but the medians of central sleep apnea index for toddler, preschool and school groups were 2.35, 1.50 and 0.90 events/h respectively (all P < 0.01). Sleep structure was similar between the groups (P > 0.05).
  
  
  CONCLUSIONS
  Central sleep apnea is common in children with sleep disordered breathing. The younger their ages, a higher prevalence of central sleep apnea.
authors: Department of Respiratory Medicine, Guangzhou Medical College, Guangzhou, China.
authors: Zhi-hui
authors: ZH
authors: Qiu
authors: Ying-xin
authors: YX
authors: Wu
authors: Hui-chan
authors: HC
authors: Yan
authors: Jia-ying
authors: JY
authors: Luo
authors: Lue-qin
authors: LQ
authors: Huang
authors: Dong-xiao
authors: DX
authors: Lu
authors: Yuan-ming
authors: YM
authors: Luo
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D017286:Polysomnography; D015995:Prevalence; D012189:Retrospective Studies; D020182:Sleep Apnea, Central / Q000175:diagnosis*; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis*