. Author manuscript; available in PMC: 2012 Apr 1.

Published in final edited form as: J Pediatr. 2010 Dec 10;158(4):617–623. doi: 10.1016/j.jpeds.2010.09.080

Table 3.

Association Between Mean Weekday Sleep Duration and Ln HOMA

	Model 1: Adjusted for Age			Model 2: Adjusted for Subject Characteristics			Model 3: Adjusted for Subject Characteristics+ Waist circumference

	Beta	95% CI	p-value	Beta	95% CI	p-value	Beta	95% CI	p-value

Intercept	1.982	1.624, 2.339	<0.001	1.500	1.086, 1.913	<0.001	2.182	1.828, 2.536	<0.001

Sleep Duration	−0.012	−0.059, 0.035	0.62	−0.002	−0.049, 0.045	0.93	0.028	−0.011, 0.068	0.16

Sleep Duration ²	0.031	0.006, 0.057	0.02	0.026	0.002, 0.050	0.03	0.023	0.003, 0.043	0.03

Age (per 1 yr increase)	−0.084	−0.107, −0.062	<0.001	−0.067	−0.091, −0.044	<0.001	−0.100	−0.121, −0.080	<0.001

Male Sex				−0.001	−0.111, 0.111	0.99	−0.137	−0.230, −0.044	0.004

Minority race				0.126	0.004, 0.249	0.04	0.129	0.034, 0.224	0.008

Preterm				0.054	−0.055, 0.162	0.33	0.045	−0.045, 0.136	0.33

Activity ^†
< 30 min				0.270	0.154, 0.386		0.192	0.098, 0.286
30–59 min				0.109	−0.027, 0.244	<0.001	0.075	−0.038, 0.187	<0.001
≥ 60 min				-ref-	-ref-		--	--

Waist (per 5 cm increase)							0.166	0.140, 0.192	<0.001

Waist ²							−0.009	−0.015, −0.002	0.007

Sleep duration and waist circumference are centered to the sample mean (7.63 and 74.75, respectively).

^†

Activity = moderate/vigorous daily activity