0693 Examining Disparities In Sleep Health (duration And Quality) Among Black And White Older Adults In The U.S.: An Analysis From The National Health And Aging Trends Study (nhats)

Disparities have been observed in studies examining sleep duration and quality between blacks and whites. Using the National Health and Aging Trends Study (NHATS), we examined association of sleep health (duration and quality) with cognitive impairment among black and white individuals.

We performed a cohort analysis of sub-group of participants in the NHATS study who provided responses to sleep questionnaires and data on cognitive impairment (n=969). Of the sample, 78.9% were white (n=895) and 21.1 % were black (n=240). Of note, 60.3% were female (n=684) and 39.7% were male (n=451). Respondents were classified as having no dementia (n=888, 78.2%) and either possible or probable dementia (n=293, 21.8%). Adjusted logistic regression examined association of sleep health (duration and quality) with cognitive impairment (no dementia vs. possible or probable dementia), contrasting blacks and whites using validated inventories. We controlled for effects of age, sex, and chronic conditions.

Those who reported sleeping <5 hours represented 12.9% of the sample (n=146). Those who reported sleeping 5-7 hours represented 47.6% (n=530) of the sample; those sleeping 7-8 hours, 25.8% (n=293); and those sleeping >8 hours, 14.6% (n=166). Compared to whites, blacks were at greater risk for reporting very short sleep (defined as <5 hours) [OR=1.76, 95%CI: 1.10-2.81], but not short sleep duration (5-7 hours) [OR=1.14, 95%CI: 0.79-1.64] or long sleep duration [OR=1.36, 95%CI: 0.86-1.2]. Compared to whites, blacks were not at greater risk for reporting poor sleep quality. Compared to whites, blacks were at greater risk for cognitive impairment [OR=2.58, 95%CI: 1.79-3.70]. Black short sleepers (5-7 hours) were significantly more likely to have cognitive impairment compared to whites [OR=2.35, 95%CI: 2.13-4.89]. However, no significant differences were noted regarding very short or long sleep.

Results showed cognitive impairment was more prevalent among blacks compared to whites. Results also showed that short sleep may moderate these associations. It was not apparent that sleep quality would play such a moderating role.

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