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. Author manuscript; available in PMC: 2026 Apr 9.

Published in final edited form as: Sleep. 2026 May 12;49(5):zsag053. doi: 10.1093/sleep/zsag053

Figure 1. — Bland-Altman plots comparing measures of sleep from the HB with PSG

Plots show the agreement of the HB compared with PSG for TST (1a), WASO (1b), SOL (1c), SE (1d), light sleep (stages N1 and N2; 1e), deep sleep (stage N3; 1f), and REM sleep (1g). The x-axis represents the average of the sleep measures from the two devices, while the y-axis represents the difference between the two devices (i.e., HB - PSG). Solid gray lines indicate 95% limits of agreement. Dotted lines indicate 95% confidence intervals. Each point represents a measurement pair.

Abbreviations: HB= Headband; PSG=Polysomnography; REM=rapid eye movement; SE=sleep efficiency; SOL=sleep onset latency; TST=total sleep time; WASO=wake after sleep onset.

Figure 1. — Bland-Altman plots comparing measures of sleep from the HB with PSG

Plots show the agreement of the HB compared with PSG for TST (1a), WASO (1b), SOL (1c), SE (1d), light sleep (stages N1 and N2; 1e), deep sleep (stage N3; 1f), and REM sleep (1g). The x-axis represents the average of the sleep measures from the two devices, while the y-axis represents the difference between the two devices (i.e., HB - PSG). Solid gray lines indicate 95% limits of agreement. Dotted lines indicate 95% confidence intervals. Each point represents a measurement pair.

Abbreviations: HB= Headband; PSG=Polysomnography; REM=rapid eye movement; SE=sleep efficiency; SOL=sleep onset latency; TST=total sleep time; WASO=wake after sleep onset.