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P3‐324: CHARACTERISTICS OF COGNITIVELY NORMAL OLDER MEXICAN AMERICANS AND NON‐HISPANIC WHITES WITH SUBJECTIVE COGNITIVE COMPLAINTS
Author(s) -
Hall James R.,
Johnson Leigh Ann,
Wiechmann April R.,
Edwards Melissa,
O'Bryant Sid
Publication year - 2018
Publication title -
alzheimer's and dementia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.713
H-Index - 118
eISSN - 1552-5279
pISSN - 1552-5260
DOI - 10.1016/j.jalz.2018.06.1685
Subject(s) - depression (economics) , cognition , worry , mexican americans , anxiety , multivariate analysis of variance , medicine , clinical psychology , cognitive decline , psychology , gerontology , dementia , psychiatry , ethnic group , disease , sociology , anthropology , machine learning , computer science , economics , macroeconomics
of the cohort was 856 7.0 years; 79% were women; mean MMSE was 29.06 1.1. The genotype makeup of the group was: e4+ 1⁄4 17 (all e3/e4); e4(e3/e3, (e2/e3) 1⁄4 72. A mean of 321 nights per participant of nighttime activity was used to estimate total sleep time. APOE e4+ carriers’ mean nightly sleep time was 6.8 hours (SD 1.4); APOE e4 carriers’ mean nightly sleep time was 7.4 hours (SD 1.6), p1⁄40.16. APOE e4 carriers had higher night-to-night variability in sleep time over the one-year monitoring period (mean 1⁄4 2.0 hours) compared to thosewithout APOE e4 (mean1⁄4 1.6 hours); (p < 0.01). Self-reported hours of sleep were correlated with the objective sleep times (Spearman correlation 1⁄4 .40; p < 0.001). Conclusions: The APOE e4 genotype is associated with greater nighttime variability in sleep time, but not mean sleep time in cognitively normal older adults. Self-report measures in this cognitively intact group regardless of APOE genotype were moderately correlated with sensor based nightly measurement. Whether night-to-night sleep metric variability is an early indicator of increased risk for MCI and subsequent ADwill require longitudinal follow-up.