title: Pediatric polysomnographic studies at a tertiary-care hospital in Singapore.
abstract: OBJECTIVE
  To investigate the indications for conducting polysomnography studies and their outcomes.
  
  
  METHODS
  Retrospective analysis of pediatric polysomnography studies performed over a four-year period (2009-2012).
  
  
  RESULTS
  425 diagnostic studies and 100 non-invasive positive-pressure ventilation titration studies were conducted. Of these, 389 were performed in male children. Obstructive sleep apnea was the most common diagnosis; 49.6% (211 studies). Other diagnoses included central apnea, narcolepsy, and periodic limb movement disorder. Night time symptoms (snoring, frequent night awakenings, restless sleep) were present in 294 children, and 161 children had daytime symptoms (excessive daytime sleepiness, early morning fatigue, poor concentration at school). 13 studies (2.5%) were inadequate for analysis, reflecting the challenges of conducting studies in children.
  
  
  CONCLUSIONS
  Dedicated pediatric sleep laboratories with properly trained staff are important to minimize failure rates and diagnose these conditions accurately.
authors.affiliation: Department of Pediatrics, National University Hospital Singapore, Singapore. Correspondence to: Dr Michael Teik Chung Lim,Department of Paediatrics, NUHS, 1E Kent Ridge Road, NUHS Tower Block Level 12, Singapore 119228. michael_tc_lim@nuhs.edu.sg.
authors.forename: K R Bharath Kumar
authors.initials: KR
authors.lastname: Reddy
authors.forename: Michael Teik Chung
authors.initials: MT
authors.lastname: Lim
authors.forename: Theodric Jun
authors.initials: TJ
authors.lastname: Lee
authors.forename: Daniel Yam Thiam
authors.initials: DY
authors.lastname: Goh
authors.forename: Mahesh Babu
authors.initials: MB
authors.lastname: Ramamurthy
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D017286:Polysomnography / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D012846:Singapore / Q000453:epidemiology; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000453:epidemiology; D012913:Snoring; D062606:Tertiary Care Centers