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Participant characteristics, % unless otherwise indicated
| Grades 4 and 5 (n=391) | Grades 7 and 8 (n=948) | |
|---|---|---|
| Gender | ||
| Boys | 47 | 39 |
| Girls | 53 | 61 |
| Race/ethnicity | ||
| Hispanic | 33 | 43 |
| Non-Hispanic black | 13 | 11 |
| Non-Hispanic white | 54 | 46 |
| Age (years, mean [SD]) | 9.88 (0.75) | 13.63 (0.69) |
| BMI category | ||
| Normal and underweight (BMI<85th percentile) | 60 | 62 |
| Overweight (85th≤BMI<95th percentile) | 21 | 21 |
| Obese (BMI 95th≥percentile) | 19 | 17 |
