Table 4.

Changes of PSQI of the SR device group and the active control group during follow-up.

	Group A					Group B
(M ± SD)	Baseline	4 wks	8 wks	12 wks	P value (post hoc)	Baseline	4 wks	8 wks	12 wks	P value
Personal subjective sleep quality	2.10 ± 0.64	1.55 ± 0.51	1.30 ± 0.47	1.45 ± 0.60	<.001*** (1 > 2, 3, 4)	1.53 ± 0.83	1.67 ± 0.82	1.60 ± 0.83	1.53 ± 0.83	.383
Sleep latency	1.85 ± 1.09	1.50 ± 0.95	1.30 ± 0.98	1.30 ± 1.03	.008** (1 > 2, 3, 4)	1.53 ± 1.13	1.53 ± 1.25	1.47 ± 1.19	1.47 ± 1.19	.915
Sleep hours	1.30 ± 0.86	1.40 ± 0.82	1.25 ± 0.79	1.35 ± 0.75	.633	1.20 ± 1.08	1.27 ± 1.10	1.20 ± 1.01	1.13 ± 0.99	.616
Sleep efficiency	1.55 ± 1.15	0.95 ± 0.89	0.85 ± 0.81	0.80 ± 0.77	<.001*** (1 > 2, 3, 4)	1.27 ± 1.28	1.13 ± 1.13	1.20 ± 1.15	1.07 ± 1.16	.467
Sleep trouble	1.35 ± 0.11	1.15 ± 0.08	1.20 ± 0.09	1.15 ± 0.08	.219	1.20 ± 0.11	1.27 ± 0.15	1.20 ± 0.11	1.27 ± 0.12	.820
Use of sleeping pills	0.45 ± 1.00	0.55 ± 0.94	0.30 ± 0.73	0.40 ± 0.88	.230	0.60 ± 1.06	0.33 ± 0.82	0.53 ± 1.06	0.40 ± 0.91	.270
Daytime dysfunction	0.85 ± 0.75	0.90 ± 0.55	0.75 ± 0.55	0.85 ± 0.59	.663	0.60 ± 0.51	0.80 ± 0.68	0.60 ± 0.63	0.60 ± 0.51	.402
Total score	9.45 ± 3.97	8.00 ± 2.94	6.95 ± 3.20	7.30 ± 3.31	<.001*** (1 > 3, 4)	7.93 ± 4.17	8.00 ± 4.64	7.80 ± 4.83	7.47 ± 4.55	.705