Table 1.

Sample characteristics: Prevalence and means

	Boys (n = 3,878), %	Girls (n = 4,150), % Total (n = 8,028), %
Weight status***
Normal/underweight	66.2	72.2	69.3
Overweight	18.5	15.9	17.2
Obese	15.2	11.8	13.5
Race/ethnicity
White	42.3	39.2	40.7
Black	19.1	19.2	19.2
Hispanic	25.6	28.4	27.0
Other	13.0	13.2	13.1
Family affluence
Low	27.0	28.1	27.6
Middle	48.8	48.4	48.6
High	24.2	23.5	23.8
Smoking
No	86.2	85.0	85.6
Yes	13.8	15.0	14.4
Age, mean (SE)	14.35 (0.08)	14.27 (0.07)	14.3 (0.07)
Body image, mean (SE)***	4.06 (0.02)	3.55 (0.03)	3.80 (0.02)
Physical activity, mean (SE)***	4.83 (0.07)	3.83 (0.08)	4.31 (0.07)
Screen-based media use, mean (SE)***	4.19 (0.10)	3.44 (0.10)	3.81 (0.10)
Breakfast consumption, mean (SE)***	2.82 (0.04)	2.47 (0.04)	2.64 (0.04)

^***p < 0.001 indicates significant differences across gender.