TABLE 1.
Mean percentage body fat, waist circumference, BMI-for-age percentile, and proportion of girls classified as overweight from age 5 to 15 y1
| Age 5 y | Age 7 y | Age 9 y | Age 11 y | Age 13 y | Age 15 y | Change (P value) | |
| Body fat (%) | 20.6 ± 4.32 | 21.8 ± 5.6 | 26.8 ± 7.5 | 27.3 ± 7.1 | 26.9 ± 6.8 | 27.9 ± 6.0 | <0.01 |
| Waist circumference (cm) | —3 | 66.9 ± 8.5 | 73.4 ± 10.7 | 73.4 ± 10.7 | 78.7 ± 10.7 | 78.8 ± 10.1 | <0.01 |
| BMI-for-age percentile4 | 59.3 ± 26.6 | 58.2 ± 27.7 | 64.0 ± 26.9 | 63.5 ± 27.5 | 62.4 ± 26.1 | 61.3 ± 24.9 | <0.05 |
| Percentage of sample overweight5 | 18 | 19 | 29 | 29 | 25 | 20.5 | <0.05 |
1
n = 170 for each age group. Mixed modeling analyses were used to generate the data in this table.
2
Mean ± SD (all such values).
3
Data not available.
4
Mean BMI percentiles correspond directly to the sample mean BMI by using age- and sex-specific Centers for Disease Control and Prevention growth charts (23).
5
Overweight is defined as ≥85th BMI-for-age percentile (23).