Table 2.

Predicted probabilities of weight status and weight-related behaviors by weekend night-school night sleep duration difference

		Weekend Night-School Night Sleep Duration Differenceb
	n	<−0.5 hours	≥−0.5 to <0.5 hours	≥0.5 to <1.5 hours	≥1.5 to <2.5 hours	≥2.5 hours	pa (df=4)
Weight status
BMI z-score ≥85th percentilec	224	15.3%	15.5%	11.6%	11.8%	18.3%	0.73
BMI z-score ≥95th percentilec	224	9.7%	12.5%	6.4%	4.3%	16.1%	0.20
Eating behaviors
Eat breakfast 5 days/week	225	43.5%	51.2%	29.4%	79.7%	73.7%	0.32
Eat supper with family 5–7 days a week	228	57.8%	52.9%	51.6%	54.6%	54.9%	0.99
Food consumption
Fruit or vegetables daily	228	72.4%	69.7%	62.2%	72.2%	70.2%	0.78
Fast food weekly	227	69.7%	71.5%	65.4%	72.7%	63.5%	0.82
Physical activity
Active 6–7 days/week	227	59.3%	48.8%	51.2%	61.2%	28.9%	0.02
Moderate-strenuous activity ≥7 hours/week	227	75.4%	41.1%	43.5%	45.8%	30.7%	0.09
Beverage consumption (mean times/day)
Sugar-sweetened beverages	228	1.5	1.3	1.1	1.4	1.2	0.81
Caffeinated beverages	228	0.5	0.3	0.5	0.8	0.6	0.36

BMI = body mass index; df = degrees of freedom

Bold text indicates p ≤0.05

^aRegression models adjusted for age, sex, free or reduced-price lunch eligibility, and racial/ethnic categorization (non-Hispanic white vs Hispanic or not white); school ID included as a random effect due to students nested within schools.

^bWeekend night-school night sleep duration difference refers to the difference in weekend night and school night sleep duration (weekend night duration – school night duration), so that a positive difference corresponds to longer duration on weekend nights compared to school nights and a negative difference corresponds to a shorter duration on weekend nights.

^cObjective height/weight data used when available.