Restricted accessResearch articleFirst published online 2014-9
Cognitive Complaints Correlate With Depression Rather Than Concurrent Objective Cognitive Impairment in the Successful Aging Evaluation Baseline Sample
Whether subjective cognitive complaints are suggestive of depression or concurrent cognitive impairment in older adults without dementia remains unclear. The current study examined this question in a large (N = 1000), randomly selected, community-based sample of adults aged 51 to 99 years without a formal diagnosis of dementia (Successful AGing Evaluation [SAGE] study).
Methods:
The modified Telephone Interview for Cognitive Status (TICS-m) measured objective cognitive function, the Cognitive Failures Questionnaire (CFQ) measured subjective cognitive complaints, and the 9-item Patient Health Questionnaire (PHQ-9) measured depression. Spearman ρ correlations and linear regression models were conducted to examine the relationship among variables in the baseline SAGE sample.
Results:
There was a weak association between TICS-m and CFQ scores (ρ = −.12); however, a moderate to large association was observed for CFQ and PHQ-9 (ρ = .44). Scores on the CFQ were not associated with TICS-m scores (β = −.03, P = .42) after controlling for PHQ-9 and variables of interest, such as age, gender, ethnicity, and physical functioning, while PHQ-9 was significantly associated with CFQ scores (β = .46, P < .001) after controlling for variables of interest.
Conclusions:
Subjective cognitive complaints are more likely related to symptoms of depression rather than concurrent cognitive impairment in a large cross-section of community-dwelling adults without a formal diagnosis of dementia.
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