TABLE 1—

Characteristics of Subjects (Means and Standard Deviations)

	All Subjects Measured At Baseline (8th Grade)		Baseline Data for Study Cohorts
	Controla (n = 1221)	Interventionb (n = 1523)	Control (n = 741)	Intervention(n = 863)
Age, y	13. 6 (0.6)	13.6 (0.7)	13.6 (0.6)	13.6 (0.6)
Height, cm	161.2 (6.6)	161.0 (7.0)	161.6 (6.5)	161.0 (7.0)
Weight, kg	60.4 (16.6)	60.0 (15.5)	60.2 (16.0)	59.7 (15.6)
BMI	23.1 (5.5)	23.1 (5.4)	23.0 (5.5)	22.9 (5.4)
Race/ethnicity, % African American	46.8%	50.7%	47.5%	52.1%

^aSample sizes for the variables ranged from 1116–1214.

^bSample sizes for the variables ranged from 1315–1512.

There were no significant differences between control and intervention for baseline values.