Table 3.

Multiple logistic regression models for testing the association between the duration of daily electronic media device usage and poor sleep quality.

		Model 1a			Model 2b			Model 3c
Device, Usage group		ORd (95% CI)	P value	OR (95% CI)		P value	OR (95% CI)		P value
Television
	1.5-3 h	1		1			1
	<1.5 h	1.55 (1.22-1.97)	<.001	1.50 (1.15-1.94)		.003	1.38 (1.03-1.84)		.03
	>3 h	1.78 (1.23-2.57)	.002	1.89 (1.29-2.77)		.001	1.85 (1.18-2.91)		.008
Computer
	2-4 h	1		1			1
	<2 h	1.63 (1.12-2.37)	.01	1.66 (1.12-2.46)		.01	1.71 (1.10-2.64)		.02
	>4 h	1.66 (1.02-2.72)	.04	1.74 (1.03-2.93)		.04	1.72 (1.01–2.92)		.04
Mobile phone
	2-4 h	1		1			1
	<2 h	1.13 (0.86-1.47)	.39	1.15 (0.86-1.53)		.35	1.10 (0.80-1.52)		.57
	>4 h	1.43 (1.04-1.96)	.03	1.45 (1.05-2.01)		.03	1.53 (1.06-2.22)		.02

^aSimple model.

^bAdjusted for gender, age, and body mass index.

^cAdjusted for gender, age, body mass index, demographics, and lifestyle factors.

^dOR: odds ratio.