Objective
To examine the temporal relation between depression and cognitive impairment in old age.
Design
Prospective, population based study with four years of follow up.
Setting
City of Leiden, the Netherlands.
Participants
500 people aged 85 years at recruitment.
Main outcome measures
Annual assessments of depressive symptoms (15 item geriatric depression scale), global cognitive function (mini-mental state examination), attention (Stroop test), processing speed (letter digit coding test), and immediate and delayed recall (12 word learning test).
Results
At 85 years old, participants’ depressive symptoms and cognitive impairment were highly significantly correlated (P < 0.001). During follow up, an accelerated annual increase of depressive symptoms was associated with impaired attention (0.08 points (95% confidence interval 0.01 to 0.16)), immediate recall (0.17 points (0.09 to 0.25)), and delayed recall (0.10 points (0.02 to 0.18)) at baseline. In contrast, depressive symptoms at baseline were not related to an accelerated cognitive decline during follow up (P > 0.05).
Conclusion
Caregivers should be aware of the development of depressive symptoms when cognitive impairment is present. However, the presence of depression only does not increase the risk of cognitive decline.
Overview publication
Title | Temporal relation between depression and cognitive impairment in old age: prospective population based study. |
Date | October 16th, 2004 |
Issue name | BMJ (Clinical research ed.) |
Issue number | v329.7471:881 |
DOI | 10.1136/bmj.38216.604664.DE |
PubMed | 15345599 |
Authors | |
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