Table 1 Baseline demographic characteristic of enrolled students, overall and by randomized condition

Age (years), M (SD)

12.7 (0.5)

12.6 (0.5)

12.7 (0.4)

Gender

 Female, n (%)

291 (55%)

182 (59%)

107 (48%)

 Male, n (%)

229 (44%)

122 (40%)

109 (50%)

 Other or unknown, n (%)

6 (1%)

2 (1%)

4 (2%)

Race

 Black, n (%)

20 (4%)

9 (3%)

11 (5%)

 White, n (%)

456 (87%)

268 (88%)

188 (85%)

 Other or unknown, n (%)

50 (9%)

29 (9%)

21 (10%)

Ethnicity

 Hispanic, n (%)

24 (5%)

15 (5%)

9 (4%)

BMI [n = 415]

 BMI z-score, M (SD)

0.9 (1.1)

0.9 (1.1)

1.0 (1.0)

 BMI percentile, M (SD)

74.1 (26.2)

73.2 (27.1)

75.8 (24.6)

 Underweight (BMI < 5th percentile), n (%)

9 (2%)

5 (2%)

4 (2%)

 Healthy Weight (BMI 5th - <85th percentile), n (%)

245 (47%)

142 (46%)

103 (47%)

 Overweight (BMI 85th - <95th percentile), n (%)

96 (18%)

57 (19%)

39 (18%)

 Obese (BMI 95th - <99th percentile), n (%)

98 (19%)

58 (19%)

40 (18%)

 Severe Obesity (BMI ≥ 99th percentile), n (%)

48 (9%)

33 (11%)

15 (7%)

 Other or unknown, n (%)

30 (6%)

11 (4%)

19 (9%)

Caregiver participation in the study

 Partial or Complete parent participation, n (%)

279 (53%)

159 (52%)

120 (55%)