title: Prevalence of dysfunctional breathing in patients treated for asthma in primary care: cross sectional survey.
abstract: OBJECTIVE
  To estimate the prevalence of dysfunctional breathing in adults with asthma treated in the community.
  
  
  METHODS
  Postal questionnaire survey using Nijmegen questionnaire.
  
  
  METHODS
  One general practice with 7033 patients.
  
  
  METHODS
  All adult patients aged 17-65 with diagnosed asthma who were receiving treatment.
  
  
  METHODS
  Score >/=23 on Nijmegen questionnaire.
  
  
  RESULTS
  227/307 patients returned completed questionnaires; 219 (71.3%) questionnaires were suitable for analysis. 63 participants scored >/=23. Those scoring >/=23 were more likely to be female than male (46/132 (35%) v 17/87 (20%), P=0.016) and were younger (mean (SD) age 44.8 (14.7) v 49.0 (13.8, (P=0.05). Patients at different treatment steps of the British Thoracic Society asthma guidelines were affected equally.
  
  
  CONCLUSIONS
  About a third of women and a fifth of men had scores suggestive of dysfunctional breathing. Although further studies are needed to confirm the validity of this screening tool and these findings, these prevalences suggest scope for therapeutic intervention and may explain the anecdotal success of the Buteyko method of treating asthma.
authors.affiliation: Surgery, Minchinhampton, Stroud, Gloucestershire GL6 9JF. drmthomas@oakridge.sol.co.uk
authors.forename: M
authors.initials: M
authors.lastname: Thomas
authors.forename: R K
authors.initials: RK
authors.lastname: McKinley
authors.forename: E
authors.initials: E
authors.lastname: Freeman
authors.forename: C
authors.initials: C
authors.lastname: Foy
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000368:Aged; D001249:Asthma / Q000150:complications / Q000175:diagnosis*; D003430:Cross-Sectional Studies; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006985:Hyperventilation / Q000175:diagnosis* / Q000209:etiology / Q000523:psychology; D008297:Male; D008875:Middle Aged; D011320:Primary Health Care / Q000706:statistics & numerical data*; D017678:Sex Distribution; D011795:Surveys and Questionnaires; D013577:Syndrome