Abstract
Background: Alterations in folate, vitamin B 12 and homocysteine plasma levels have been associated with aging, neuronal development and depressive symptomatology. Nevertheless, the associations are not strong enough to suggest the use of these parameters in every day practice for diagnostic or therapeutic purposes. Objectives: The aim of the study was to investigate the relationship between plasma folate, vitamin B 12 and homocysteine in depressive states in the elderly. Methods: Community-dwelling, elderly individuals over 60 years of age were screened with the Geriatric Depression Scale. The study population was divided into two groups: (a) 33 subjects with depression and (b) 33 healthy controls. All participants were clinically evaluated and completed a questionnaire for socio-demographic and clinical data. Measurements of folate, vitamin B 12 and homocysteine were estimated in all blood samples and results were statistically evaluated at p < 0.05 level of significance. Results: No statistical significance emerged for the socio-demographic data between the two groups. Chronic diseases such as stroke, hypercholesterolemia, hypertension and diabetes also did not differ between the depression and control group. Group (a) had significantly lower levels of folate and vitamin B 12 than group (b). Homocysteine was significantly higher in depressed individuals than in controls. Conclusion: Lower levels of plasma folate and/or vitamin B 12, and higher levels of plasma homocysteine are associated with depression in elderly individuals.
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