Table 2.

Means and comparisons of sleep indices between the control period and the intervention period.

Variable	Control period		Intervention period		Periodb		Time		Period × time
	M	SD	M	SD	F c	p	F c	p	F c	p
SL (min)	32.2	17.8	29.2	17.7	0.75	0.399	1.19	0.261	0.85	0.649
TST (min)	444.3	89.3	461.2	95.2	10.08	0.005∗∗	0.99	0.471	0.98	0.483
SE (%)	72.9	11.3	74.6	12.0	4.26	0.054	0.95	0.519	1.02	0.435
DLSSP (min)	173.0	52.1	186.2	62.6	4.46	0.049∗	1.33	0.159	0.76	0.754
WTASO (min)	129.6	59.8	125.8	70.0	0.31	0.586	0.59	0.914	0.75	0.767
EMA (times)a	1.5	2.5	0.7	1.5	−2.59	0.010∗
NPI	6.4	6.0	5.6	6.0	3.86	0.065	2.67	0.083	5.41	0.032∗

Note. ^aZ-value refers to overall time of each period effect using Wilcoxon signed rank test.

^bPeriod comparing the control and intervention periods.

^c F-value refers to main and alternate effects using two-way ANOVA.

N = 19.

^∗ p < 0.05, ^∗∗p < 0.01.