Table 5.

LMEM results for comparison between the present study and our previously published study [31], by outcome measure

Outcome	Estimated Mean±SEM, by lighting intervention and data collection period			Main effect/interaction	df	Error	F	p
Sleep quality (PSQI)	Active	Baseline	11.04±0.48	Lighting intervention	1	89.22	3.78	0.06
		Intervention	6.88±0.50	Data collection period	1	85.78	30.38	<0.001
	Control	Baseline	9.80±0.49	Lighting intervention ×	1	85.78	12.44	0.001
		Intervention	8.41±0.49	data collection period
Depression (CSDD)	Active	Baseline	10.72±0.80	Lighting intervention	1	87.65	0.06	0.811
		Intervention	5.65±0.84	Data collection period	1	84.80	56.69	<0.001
	Control	Baseline	10.73±0.83	Lighting intervention ×	1	84.80	14.20	<0.001
		Intervention	9.61±0.83	data collection period
Agitation (CMAI)	Active	Baseline	45.06±2.05	Lighting intervention	1	87.44	0.09	0.77
		Intervention	37.21±2.11	Data collection period	1	82.79	19.53	<0.001
	Control	Baseline	42.70±2.11	Lighting intervention ×	1	82.79	9.01	0.004
		Intervention	41.20±2.11	data collection period

PSQI, Pittsburgh Sleep Quality Index; CSDD, Cornell Scale for Depression in Dementia; CMAI, Cohen-Mansfield Agitation Inventory; LMEM, Linear mixed-effects model. Statistically significant (p < 0.05) results are shown in bold.