Table 2.

Multiple regression analysis of social development with sleep habit variables as predictors.

Independent variables	B (SE; 95% CI)	β	t test (df)	P value
Wake-up time (Δ)	−2.092 (4.011; −10.130 to 5.946)	−0.281	−0.522 (54)	.60
Wake-up time SD (Δ)	0.025 (0.037; −0.048 to 0.098)	.107	0.681 (54)	.50
Bedtime (Δ)	3.606 (4.085; −4.581 to 11.794)	.434	0.883 (54)	.38
Bedtime SD (Δ)	−0.033 (0.035; −0.104 to 0.038)	−0.165	−0.941 (54)	.35
Sleep onset latency (Δ)	0.043 (0.072; −0.101 to 0.188)	.160	0.601 (54)	.55
Sleep onset latency SD (Δ)	0.145 (0.039; 0.068 to 0.223) a	.426	2.521 (54)	.02
Nighttime sleep duration (Δ)	0.042 (0.061; −0.081 to 0.165)	.354	0.686 (54)	.50
Nighttime sleep duration SD (Δ)	0.022 (0.035; −0.048 to 0.091)	.119	0.633 (54)	.53
Social sleep restriction (Δ)	−0.019 (0.010; −0.040 to 0.001)	−0.250	−1.912 (54)	.06
Social jetlag (Δ)	−4.166 (1.445; −7.053 to 1.278)	−0.302	−2.883 (54)	.03

^aItalicized values indicate significance.