Table 1.

Sleep parameters were compared among the devices/conditions.

	Bland–Altman	Correlation analysis
		Bias (95% limits of agreement)	Pearson r	P (two-tailed)
(A) Sleep duration
SS	−10.8 (−85.18 ± 63.58)	0.7286	0.0003	***
Act80	18.9 (−60.55 ± 98.35)	0.5534	0.0114	*
Act40	−13 (−105.2 ± 79.24)	0.4246	0.062	ns
Act20	−52.6 (−159.5 ± 54.3)	0.3975	0.0826	ns
MTN-B	−65.4 (−214 ± 83.21)	0.3131	0.1789	ns
MTN-W	−159 (−316.2 ± −1.842)	0.2821	0.2281	ns
(B) Sleep latency
SS	14.9 (−49.54 ± 79.34)	0.3597	0.1193	ns
Act80	2.3 (−24.33 ± 28.93)	0.1851	0.4347	ns
Act40	8.5 (−63.3 ± 80.3)	0.2434	0.3011	ns
Act20	8.8 (−22.62 ± 40.22)	0.2518	0.2841	ns
MTN-B	15.3 (−26.87 ± 57.47)	0.1626	0.4935	ns
MTN-W	23.2 (−27.25 ± 73.65)	0.06577	0.7829	ns
(C) WASO
SS	−3.4 (−83.33 ± 76.53)	0.6397	0.0024	**
Act80	−24.6 (−106.6 ± 57.38)	0.5259	0.0172	*
Act40	2.5 (−93.77 ± 98.77)	0.3694	0.1089	ns
Act20	38.2 (−76.5 ± 152.9)	0.3204	0.1685	ns
MTN-B	40.9 (−96.4 ± 178.2)	0.2793	0.2331	ns
MTN-W	124.5 (−59.14 ± 308.1)	0.2198	0.3517	ns

Bland–Altman analysis and correlation analysis were conducted against estimations by various methods. Panel (A) shows result for sleep duration, (B) for sleep latency, and (C) for WASO.

WASO, wake after sleep onset.