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Prevalence and correlates of depression in Chinese elderly patients with pneumoconiosis

Recent literature suggests that patients with pneumoconiosis may be at higher risk of developing psychiatric problems, particularly depressive illness. There are no published data on depressive disorders in elderly patients with pneumoconiosis. The aim of this study was to evaluate the prevalence and correlates of depressive disorders in a community sample of elderly Chinese patients with pneumoconiosis in Hong Kong. Two hundred and one patients with pneumoconiosis were randomly selected from the case register of the Pneumoconiosis Compensation Fund Board of Hong Kong. A psychiatrist conducted a structured clinical interview to diagnose depressive disorders according to the Diagnostic Statistical Manual for Mental Disorders, Version IV criteria. Nineteen (9.5%) patients had depressive illness. Univariate logistic regression revealed that the number of comorbid conditions, and the scores on the Lubben Social Network Scale (LSNS) and Instrumental Activities of Daily Living (IADL) were significant predictors of depressive disorders. Multivariate logistic regression analysis found that IADL and LSNS scores were the only independent predictors of depressive disorders. In conclusion, depressive disorders were common and associated with poorer functional ability and social support in patients with pneumoconiosis.