CitationRamos, Alberto R.; Tarraf, Wassim; Wu, Benson; Redline, Susan S.; Cai, Jianwen; Daviglus, Martha L.; Gallo, Linda C.; Mossavar-Rahmani, Yasmin; Perreira, Krista M.; & Zee, Phyllis C., et al. (2020). Sleep and Neurocognitive Decline in the Hispanic Community Health Study/Study of Latinos. Alzheimer's & Dementia, 16(2), 305-315. PMCID: PMC7007834
AbstractINTRODUCTION: To determine if sleep-disordered breathing (SDB), daytime sleepiness, insomnia, and sleep duration predict seven-year neurocognitive decline in US Hispanics/Latinos (N = 5247).
METHODS: The exposures were baseline SDB, daytime sleepiness, insomnia, and sleep duration. The outcomes were change in episodic learning and memory (B-SEVLT-Sum and SEVLT-Recall), language (word fluency [WF]), processing speed (Digit Symbol Substitution), and a cognitive impairment screener (Six-item Screener [SIS]).
RESULTS: 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 (betaSEVLT-Sum = -0.22 [se = 0.06]; P < .001; betaSEVLT-Recall = -0.13 [se = 0.06]; P < .05), WF (betaWF = -0.20 [se = 0.06]; P < .01), and SIS (betaSIS = -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.
CONCLUSION: Long sleep duration predicted seven-year cognitive decline.
Reference TypeJournal Article
Journal TitleAlzheimer's & Dementia
Author(s)Ramos, Alberto R.
Redline, Susan S.
Daviglus, Martha L.
Gallo, Linda C.
Perreira, Krista M.
Zee, Phyllis C.
Gonzalez, Hector M.