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Development of an antidepressant compliance questionnaire
K Demyttenaere1, R Bruffaerts, A Albert
1Department of Psychiatry, University Hospital Gasthuisberg, Leuven, Belgium. koen.demyttenaere@med.kuleuven.ac.be
Objective:
The development of the Antidepressant Compliance Questionnaire (ADCQ), assessing patients' attitudes and beliefs on depression and antidepressants.
Method:
A 51-item questionnaire was applied to 85 psychiatric out-patients with a DSM-IV diagnosis of major depressive disorder (MDD). This data set was used to assess psychometric properties of the ADCQ. The questionnaire was also applied to 272 primary care out-patients with MDD.
Results:
A principal component analysis revealed four dimensions with good internal consistency and acceptable test-retest reliability: 'perceived doctor-patient relationship', 'preserved autonomy', 'positive beliefs on antidepressants' and 'partner agreement', resulting in a final questionnaire comprising 33-items. Responses were independent from depression severity and patient age. The response patterns of both psychiatric and primary care patients are provided and illustrate the many erroneous beliefs on antidepressants.
Conclusion:
The ADCQ has good psychometric properties; further investigation should investigate whether this questionnaire is predictive of patient compliance.