title: The prevalence of asthma in patients with obstructive sleep apnoea.
abstract: BACKGROUND
  Most of the studies that have explored the relationship between obstructive sleep apnoea (OSA) and asthma have focused on the prevalence of snoring and OSA symptoms in patients with asthma.
  
  
  OBJECTIVE
  This study was conducted to measure the reverse relationship - the prevalence of asthma in patients with diagnosed OSA.
  
  
  METHODS
  We assessed the prevalence of asthma in all patients diagnosed polysomnographically to have OSA during the study period. A logistic regression model was developed to assess the predictors for asthma in patients with OSA.
  
  
  RESULTS
  Six-hundred-and-six patients with OSA with a mean age of 40+/-14.5 yr (66.7% males) were included. Asthma was present in 213 OSA patients - a prevalence of 35.1%. Body mass index (>35 kg/m2) was the only predictor of asthma.
  
  
  CONCLUSIONS
  Physicians should keep in mind the link between OSA and asthma. When one of these disorders is diagnosed, clinicians should consider the possible presence of the other.
authors.affiliation: Sleep Disorders Center, King Saud University, Riyadh, Saudi Arabia.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Alharbi
authors.forename: Abdulelah
authors.initials: A
authors.lastname: Almutairi
authors.forename: Dhawi
authors.initials: D
authors.lastname: Alotaibi
authors.forename: Azam
authors.initials: A
authors.lastname: Alotaibi
authors.forename: Shaffi
authors.initials: S
authors.lastname: Shaikh
authors.forename: Ahmed S
authors.initials: AS
authors.lastname: Bahammam
mesh_terms: D000328:Adult; D001249:Asthma / Q000453:epidemiology*; D015992:Body Mass Index; D005260:Female; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D017286:Polysomnography; D011237:Predictive Value of Tests; D015995:Prevalence; D012529:Saudi Arabia / Q000453:epidemiology; D020181:Sleep Apnea, Obstructive / Q000453:epidemiology*; D011795:Surveys and Questionnaires