Abstract
Clinical studies have mostly linked anxiety disorders with asthma in young patients, but the data are inconsistent for depression. Few population-based studies have investigated the co-morbid diagnoses of mental disorders with asthma in older adults. Cross-sectional study of a population sample of older adults aged 60 and above (n = 1092). The diagnoses of recent depression and anxiety were made using the Geriatric Mental State (GMS) Schedule. The presence of asthma was ascertained by self-reports of physician-diagnosed asthma. Asthma was associated with a higher prevalence of depressive disorders, with odds ratio of 2.45 (95% CI, 1.06-5.69) when compared against non-asthmatic controls; and 2.42 (95% CI, 1.04-5.64) when compared against controls with other chronic illnesses, after adjusting for psychosocial factors, physical co-morbidity and use of depression-causing drugs. Odds ratios were elevated but statistically insignificant for anxiety disorders and dementia. We observed that asthma in the elderly was more evidently associated co-morbidly with depression, rather than anxiety disorder. However, possible associations with anxiety and dementia are not excluded, and should be further investigated.
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