Table 1.

Descriptive information for participating children

	Study Group
	Treatment Group (n=216)	Comparison Group (n=98)	Total (n=314)
Age in months
M	53.45	53.53	53.47
SD	3.55	3.50	3.53
% female	50.00	46.90	49.00
% speaking English at home	95.40	95.90	95.50
Race-ethnicity
% White, non-Hispanic	40.30	48.00	42.70
% African American/Black	41.70	35.70	39.80
% Hispanic-Latino	6.00	5.10	5.70
% Multiracial	9.30	9.20	9.20
% Other	2.70	2.00	2.60
Maternal education (highest degree attained)
% no high school diploma	14.40	25.50	17.80
% high school diploma	18.10	24.50	20.10
% high school diploma plus some college or   technical training	44.90	27.60	39.40
% associate’s degree	8.30	12.20	9.60
% bachelor’s degree	8.30	6.10	7.60
% graduate degree	1.90	2.00	1.90
Family income
% $0 to $15,000	30.60	37.70	32.50
% $15,001 to $30,000	28.20	22.20	26.50
% $30,001 to $45,000	15.70	16.40	15.90
% $45,001 to $60,000	7.90	11.20	8.90
% > $60,000	10.20	7.30	7.90

Note. Percentages may not sum to 100% due to rounding or missing data.