Does self-reported sleep quality predict poor cognitive performance among elderly living in elderly homes?

Area of Science:

• Gerontology
• Sleep Medicine
• Cognitive Neuroscience

Background:

• Elderly individuals, particularly those in institutional settings, frequently report sleep disturbances and diminished sleep quality.
• Existing research suggests a potential correlation between poor sleep and cognitive deficits in older adults.
• Sedative-hypnotic medication use is higher in institutionalized elderly compared to community-dwelling counterparts.

Purpose of the Study:

• To investigate the relationship between subjective sleep quality and objective cognitive performance in older adults residing in elderly homes.
• To assess cognitive function using standardized tools in relation to sleep quality.

Main Methods:

• A cohort of 100 elderly residents from an Egyptian care facility was studied.
• Participants were divided into two groups: 50 with poor sleep quality (using Pittsburgh Sleep Quality Index - PSQI) and 50 with good sleep quality.
• Cognitive function was evaluated using the Mini-Mental State Examination (MMSE), and geriatric depression was assessed via the Geriatric Depression Scale (GDS).

Main Results:

• A significantly higher proportion of poor sleepers (52%) exhibited impaired cognitive function (MMSE scores) compared to good sleepers (24%).
• Specific cognitive domains, including orientation and attention/calculation, were more profoundly affected in the poor sleep group.
• A negative correlation was observed between PSQI scores and total MMSE scores, indicating poorer sleep quality is associated with worse cognitive performance.

Conclusions:

• Poor sleep quality is demonstrably associated with cognitive impairment in elderly individuals living in residential care settings.
• These findings underscore the importance of recognizing and managing sleep disturbances in this demographic to mitigate cognitive decline.