Table 4.

Bias, precision, and 95% limits of agreement (adjusted for repeated measures) for 7 days of total sleep time, sleep efficiency, and sleep midpoint as compared between single-channel EEG, actigraphy, and diary.

	α	σ	95% LoA Lower	95% LoA Upper
Total sleep time, h
EEG vs CSD	−0.67	1.03	−2.72	1.39
Actigraphy vs CSD	−0.52	0.92	−2.36	1.32
EEG vs actigraphy	−0.13	0.84	−1.81	1.54
Sleep efficiency, %
EEG vs CSD	−7.07	11.68	−30.43	16.29
Actigraphy vs CSD	−6.32	10.58	−27.47	14.83
EEG vs actigraphy	−0.55	9.97	−20.49	19.39
Sleep midpoint, t
EEG vs CSD	−0.10	0.35	−0.81	0.61
Actigraphy vs CSD	−0.02	0.30	−0.61	0.57
EEG vs actigraphy	−0.08	0.27	−0.62	0.47

CSD = Consensus Sleep Diary, EEG = single-channel electroencephalography, LoA = limit of agreement, t = time, α = bias, σ = precision.