Sleep and neurocognitive decline in the Hispanic Community Health Study/Study of Latinos

Mean age was 63 ± 8 years, with 55% of the population being female with 7.0% Central American, 24.5% Cuban, 9.3% Dominican, 35.9% Mexican, 14.4% Puerto Rican, and 5.1% South American background. Long sleep (>9 hours), but not short sleep (<6 hours), was associated with decline (standard deviation units) in episodic learning and memory (β_SEVLT-Sum = −0.22 [se = 0.06]; P < .001; β_SEVLT-Recall = −0.13 [se = 0.06]; P < .05), WF (β_WF = −0.20 [se = 0.06]; P < .01), and SIS (β_SIS = −0.16 [se = 0.06]; P < .01), but not processing speed, after adjusting for covariates. SDB, sleepiness, and insomnia were not associated with neurocognitive decline.