title: Sleep-disordered breathing is associated with asthma severity in children.
abstract: OBJECTIVE
  To examine the relationships among obesity, sleep-disordered breathing (SDB, defined as intermittent nocturnal hypoxia and habitual snoring), and asthma severity in children. We hypothesized that obesity and SDB are associated with severe asthma at a 1- year follow-up.
  
  
  METHODS
  Children aged 4-18 years were recruited sequentially from a specialty asthma clinic and underwent physiological, anthropometric, and biochemical assessment at enrollment. Asthma severity was determined after 1 year of follow-up and guideline-based treatment, using a composite measure of level of controller medication, symptom burden, and health care utilization. Multivariate logistic regression was used to examine adjusted associations of SDB and obesity with asthma severity at 12-month follow-up.
  
  
  RESULTS
  Among 108 subjects (mean age, 9.1±3.4 years; 45.4% African-American; 67.6% male), obesity and SDB were common, affecting 42.6% and 29.6% of subjects, respectively. After adjusting for obesity, race, and sex, children with SDB had a 3.62-fold increased odds of having severe asthma at follow-up (95% CI, 1.26-10.40). Obesity was not associated with asthma severity.
  
  
  CONCLUSIONS
  SDB is a modifiable risk factor for severe asthma after 1 year of specialty asthma care. Further studies are needed to determine whether treating SDB improves asthma morbidity.
authors: Department of Pediatrics, Case Western Reserve University, Cleveland, OH, USA. kristie.ross@uhhospitals.org
authors: Kristie R
authors: KR
authors: Ross
authors: Amy
authors: A
authors: Storfer-Isser
authors: Meeghan A
authors: MA
authors: Hart
authors: Anna Marie V
authors: AM
authors: Kibler
authors: Michael
authors: M
authors: Rueschman
authors: Carol L
authors: CL
authors: Rosen
authors: Carolyn M
authors: CM
authors: Kercsmar
authors: Susan
authors: S
authors: Redline
mesh_terms: D000293:Adolescent; D017677:Age Distribution; D000704:Analysis of Variance; D000886:Anthropometry; D018927:Anti-Asthmatic Agents / Q000627:therapeutic use; D001249:Asthma / Q000175:diagnosis* / Q000188:drug therapy / Q000453:epidemiology*; D015992:Body Mass Index; D002648:Child; D002675:Child, Preschool; D015331:Cohort Studies; D015897:Comorbidity; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015994:Incidence; D016015:Logistic Models; D008297:Male; D015999:Multivariate Analysis; D009765:Obesity / Q000175:diagnosis / Q000453:epidemiology*; D010092:Oximetry / Q000379:methods; D017286:Polysomnography / Q000379:methods; D011446:Prospective Studies; D018570:Risk Assessment; D012720:Severity of Illness Index; D017678:Sex Distribution; D012891:Sleep Apnea Syndromes / Q000175:diagnosis / Q000453:epidemiology* / Q000628:therapy
chemical_list: D018927:Anti-Asthmatic Agents