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Identification of depression in a rural general practice
Abstract
Major depression is underdiagnosed by general practitioners, but the reasons for this are not clear. This study aimed to establish the prevalence of major depression and coexisting generalised anxiety disorder in a rural general practice in the Orange Free State. It also assessed the predictive value of a screening questionnaire for use by general practitioners. The two practitioners evaluated 858 patients over a 4-week period. Those who met the screening criteria, together with a random sample of 60 patients who did not, were re-evaluated by a registrar in psychiatry who was unaware of the findings of his colleagues. Of the patients studied, 134 (15,6%) had major depression; 59 of these (44,0%) also had coexisting generalised anxiety disorder. The general practitioners had . correctly diagnosed major depression in 32 patients (3,7%) before the study started. The screening questionnaire had a 42% chance of correctly identifying a patient with depression and a 97% chance of correctly identifying a patient who did not have major depression. Both practitioners were equally capable at identifying major depression. The study confirmed both the high prevalence of depression in a rural general practice and its low identification rate. It also showed the advantage of using a screening questionnaire to alert practitioners to the possibility of depression in their patients.
