Table 1.

Demographic characteristics

Demographic characteristic	Percent ± SE
Age, years
6–11	50.8±1.7
12–17	49.2±1.7
Income
≤200% FPL	48.2±1.7
200%–400% FPL	29.3±1.6
>400% FPL	22.5±1.3
Household education
HS or less	32.4±1.8
More than HS	67.6±1.8
Sex
Male	70.4±1.5
Female	29.6±1.5
Race and ethnicity
White non-Hispanic	61.5±1.8
Black non-Hispanic	15.9±1.3
Hispanic	13.4±1.4

Notes: The three race and ethnicity categories did not include participants who were indicated to be both white and black or belonging to a different racial group than white or black.

Abbreviations: SE, standard error; FPL, federal poverty level; HS, high school.