Vascular risk factors and incident late-life depression in a Korean population

BACKGROUND: Causal relationships between vascular factors and late-life depression are controversial. AIMS: To investigate prospective associations between risk factors for vascular disease and incidence of late-life depression. METHOD: Of 661 community participants aged 65 years or over, without depression at baseline, 521 (79%) were re-evaluated 2 years later. At baseline and follow-up, a diagnostic interview for depression was carried out and information on vascular status, disability and cognitive function was gathered. RESULTS: Pre-existing heart disease, incident stroke and lower baseline high-density lipoprotein cholesterol level were significantly associated with incidence of late-life depression, independently of disability and cognitive function. CONCLUSIONS: These results provide some support for a vascular aetiology of late-life depression. However, important risk factors for cerebrovascular disease such as hypertension and diabetes were not implicated, and the associations with lipid levels might still be explained by affective states earlier in life.