Table 1.
Baseline Characteristics of 707 Children With Baseline and 12-week BMI Assessments Participating in the BOKS Study
| Characteristics | 3 day/week BOKS participants (n=151) | 2 day/week BOKS participants (n=274) | Control participants (n=282) | p-value |
|---|---|---|---|---|
| Age, years, mean (SD) | 8.5 (1.3) | 9.4 (1.9) | 9.2 (1.9) | <0.01 |
| Boy, n (%) | 84 (55.6) | 130 (47.5) | 134 (47.5) | 0.21 |
| BMI, kg/m2, mean (SD) | 18.0 (3.2) | 18.5 (4.0) | 18.3 (3.7) | 0.51 |
| BMI z-score, mean (SD) | 0.58 (1.0) | 0.41 (1.1) | 0.45 (1.1) | 0.31 |
| BMI percentile, age and sex adjusted, n (%) | 0.84 | |||
| Underweight (<5th percentile) | 4 (2.7) | 9 (3.3) | 9 (3.2) | |
| Normal weight (5th – <85th percentile) | 95 (62.9) | 180 (65.6) | 188 (66.7) | |
| Overweight (85th – <95th percentile) | 28 (18.5) | 40 (14.6) | 39 (13.8) | |
| Obese (≥95th percentile – severe) | 18 (11.9) | 30 (11.0) | 37 (13.1) | |
| Severe obesity (≥120% of 95th percentile) | 6 (4.0) | 15 (5.5) | 9 (3.2) | |
| Social-emotional wellness scores, mean (SD) | ||||
| Peer relationships, mean (SD) | 28.2 (8.6) | 27.6 (7.5) | 29.2 (7.2) | 0.15 |
| Positive affect, mean (SD) | 33.6 (8.5) | 33.5 (7.0) | 34.4 (6.9) | 0.48 |
| Life satisfaction, mean (SD) | 17.1 (3.5) | 17.1 (2.9) | 17.5 (2.8) | 0.36 |
| Vitality/energy, mean (SD) | 16.5 (3.2) | 15.5 (3.0) | 16.0 (2.6) | 0.02 |
| Student engagement, mean (SD) | 12.2 (4.4) | 12.6 (3.8) | 12.8 (3.8) | 0.55 |
Notes: Boldface indicates statistical significance (p<0.05) of F-statistic or chi-square statistic.
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