The psychological factors associated with poor compliance with treatment in asthma

Poor patient compliance with inhaled medication is known to cause morbidity and mortality in asthma. The reasons for nonadherence are not fully understood. We wondered whether psychological factors, such as patient attitudes to asthma and its treatment, anxiety, depression, and interpersonal problems, may be related to asthma self-care and compliance. In a prospective study, 102 patients with asthma, aged 18-70 yrs, requiring treatment with regular inhaled corticosteroids and beta-agonists were recruited from a hospital out-patient clinic and four general practices in South East London. They underwent psychological assessment using the Hospital Anxiety and Depression Scale (HADS), the Inventory of Interpersonal Problems (IIP), and a semi-structured interview focusing on patient attitudes, self-care, compliance, social support and treatment beliefs. Patients were given terbutaline and budesonide turbohalers to use twice daily over 12 weeks. Turbohaler Inhalation Computers (TICs) recorded each inhalation, providing a measurement of compliance. Seventy two patients completed the study. Thirty seven took less than 70% of the prescribed dose over the study period or omitted doses for 1 week and were defined as noncompliant. The noncompliant group had a higher mean (SD) score for depression (4.7 (3.3)) than the compliant group (3.2 (2.5)). The sample had a high mean (SD) score for anxiety (8.3 (4.4)), but there was no significant difference between the compliant and noncompliant groups. Patients' self-report and clinicians' impressions of compliance were not good predictors of actual compliance. Using discriminant analysis, a model was obtained from the questionnaires and interview items, which correctly classified 74% of the patients as compliant or non-compliant.(ABSTRACT TRUNCATED AT 250 WORDS)

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