LAUSR

Polysomnography (PSG) is the gold standard for objective sleep measurement but may not reflect habitual sleep patterns, especially in older adults with sleep disturbances. We compared measurements from an electroencephalography(EEG)-measuring headband, averaged over seven nights, to one night of home-based polysomnography. In a prospective, observational study among 33 community-living adults ≥65 years reporting symptoms of insomnia and/or daytime sleepiness ≥once/week, we collected objective measures of total sleep time [TST], sleep latency [SOL], wake after sleep onset [WASO], and sleep efficiency [SE] from an EEG-headband (Dreem; Paris, France) and home-based PSG (NOX-A1 Sleep System; Reykjavik, Iceland). Measures from the EEG-headband were averaged over seven days and compared to measures from one night of PSG. Pearson correlation coefficients compared agreement between the EEG-headband and PSG for TST, SOL, WASO, and SE. Two-sample paired T-tests examined mean differences within subjects for TST, SOL, WASO, and SE between the headband and PSG. The mean age was 75 (±6) years, 76% were women, mean scores for the Epworth Sleepiness Scale and Insomnia Severity Index were 6 (±4) and 13 (±4), respectively, and the mean AHI was 19 (±16) events/hr. Correlations for TST, SOL, WASO, and SE between the EEG-headband and PSG were 0.58, 0.51, 0.48, and 0.64, respectively (p values < 0.01). On average, EEG-headband values for objective sleep measures were lower than PSG values. The mean differences for the EEG-headband and PSG within subjects for TST, SOL, WASO, and SE were 25 minutes (p=0.04), 15 minutes (p=0.06), 3 minutes (p=0.74), and 5 percent (p=0.02), respectively. Among community-dwelling older adults with insomnia and daytime sleepiness, objective sleep measures from an EEG-headband, averaged over a week, were moderately correlated with values from one night of home-based PSG. While further validation of the EEG-headband is needed, these results suggest it may be inappropriate to infer habitual sleep patterns from PSG measures in older adults with sleep disturbances. Claude D. Pepper Older Americans Independence Center at Yale (P30AG021342), the Patterson Trust, and the National Institute on Aging (R03AG073991, K76AG074905).