Mean age BMI and 550-m run performance speed for boys and girls in the matched and complete 1991 and 2003 data sets
| Matched data set | Complete data set | |||||||
|---|---|---|---|---|---|---|---|---|
| Boys | Girls | Boys | Girls | |||||
| 1991 | 2003 | 1991 | 2003 | 1991 | 2003 | 1991 | 2003 | |
| n | 46 | 46 | 54 | 54 | 294 | 96 | 217 | 110 |
| Age | 11.7 | 11.7 | 11.6 | 11.6 | 12.0 | 11.5 | 11.8 | 11.5 |
| BMI | 18.2 | 18.3 | 19.0 | 18.9 | 18.6 | 19.9* | 19.1 | 20.1† |
| 550-m speed m s−1 | 4.1 | 3.6* | 3.6 | 3.3† | 4.0 | 3.3* | 3.6 | 3.1† |