The Association Between Subjective Mental Impairment and Objective Cognitive Performance in Non-Demented, Very Mild and Mild Demented Individuals.

Objectives: Explore associations between subjective mental impairment, objective cognitive performance, and subsequent decline in older individuals with different cognitive statuses in Taiwan.

Methods: Use self-reported questionnaire and cognitive abilities screening instrument to assess subjective and objective cognitive function. Categorize participants as reporters or non-reporters based on subjective reports. Conduct t-tests and regression analysis.

Results: 206 participants were assessed: 99 cognitively intact (CI), 44 very mild dementia, and 63 mild dementia. In the CI group, reporters in memory, orientation, daily life, community affairs, and judgement domains performed worse than non-reporters. In very mild dementia group, reporters in memory and personality domains performed better than non-reporters. No association found between subjective reports and 1-year cognitive decline in dementia groups.

Conclusion: Association between subjective impairment and objective performance differs in CI and very mild dementia groups. Subjective reports do not predict 1-year cognitive decline in dementia patients. Longer follow-up studies needed.