title: Two new tools for assessing patients' knowledge and beliefs about obstructive sleep apnea and continuous positive airway pressure therapy.
abstract: OBJECTIVE
  Patients' knowledge and beliefs about their illnesses are known to influence a range of health related variables, including treatment compliance. It may, therefore, be important to quantify these variables to assess their impact on compliance, particularly in chronic illnesses such as Obstructive Sleep Apnea (OSA) that rely on self-administered treatments. The aim of this study was to develop two new tools, the Apnea Knowledge Test (AKT) and the Apnea Beliefs Scale (ABS), to assess illness knowledge and beliefs in OSA patients.
  
  
  METHODS
  The systematic test construction process followed to develop the AKT and the ABS included consultation with sleep experts and OSA patients. The psychometric properties of the AKT and ABS were then investigated in a clinical sample of 81 OSA patients and 33 healthy, non-sleep disordered adults.
  
  
  RESULTS
  Results suggest both measures are easily understood by OSA patients, have adequate internal consistency, and are readily accepted by patients. A preliminary investigation of the validity of these tools, conducted by comparing patient data to that of the 33 healthy adults, revealed that apnea patients knew more about OSA, had more positive attitudes towards continuous positive airway pressure (CPAP) treatment, and attributed more importance to treating sleep disturbances than non-clinical groups.
  
  
  CONCLUSIONS
  Overall, the results of psychometric analyses of these tests suggest these measures will be useful clinical tools with numerous beneficial applications, particularly in CPAP compliance studies and apnea education program evaluations.
authors.affiliation: The Prince Charles Hospital, Brisbane, School of Psychology, University of Queensland, St Lucia Q 4070, Australia. s.smith@psy.uq.edu.au
authors.forename: Simon
authors.initials: S
authors.lastname: Smith
authors.forename: Cathryne
authors.initials: C
authors.lastname: Lang
authors.forename: Karen
authors.initials: K
authors.lastname: Sullivan
authors.forename: Judith
authors.initials: J
authors.lastname: Warren
mesh_terms: D000328:Adult; D000368:Aged; D016022:Case-Control Studies; D005260:Female; D007722:Health Knowledge, Attitudes, Practice; D006801:Humans; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011175:Positive-Pressure Respiration; D011581:Psychological Tests; D011594:Psychometrics; D015203:Reproducibility of Results; D020181:Sleep Apnea, Obstructive / Q000523:psychology*