Table 1 Sample description at age 11
| Â | Boys Mean (SD) | Girls Mean (SD) | Full sample Mean (SD) |
|---|---|---|---|
Age (years) | 11·75 (0·21) | 11·75 (0·20) | 11·75 (0·20) |
BMI (kg/m2) | 18·45 (3·00) | 18·65 (3·14) | 18·55 (3·07) |
BMI category using standard (chronological) age-matched norms | |||
| Â | N (%) | N (%) | N (%) |
 Underweight | 16 (2) | 15 (2) | 31 (2) |
 Healthy weight | 522 (71) | 619 (79) | 1141 (75) |
 Overweight | 99 (13) | 71 (9) | 170 (11) |
 With obesity | 101 (14) | 82 (10) | 183 (12) |
BMI category using maturity adjusted (biological) age-matched norms | |||
 Underweight | 13 (2) | 17 (2) | 30 (2) |
 Healthy weight | 544 (74) | 650 (83) | 1194 (78) |
 Overweight | 99 (13) | 78 (10) | 177 (12) |
 With obesity | 82 (11) | 42 (5) | 124 (8) |
Biological maturity indicators | |||
 % adult height achieved (SD) | 84% (1·91) | 93% (3·65) | 88% (5·37) |
 Early maturers | 59 (8) | 252 (32) | 311 (20) |
 Average maturers | 665 (90) | 493 (63) | 1158 (76) |
 Late maturers | 14 (2) | 42 (5) | 56 (4) |