|  |  | 3.5 years old | 4 years old | 4.5 years old | 5 years old | 5.5 years old | 6 years old | 6.5 years old | Total |
---|---|---|---|---|---|---|---|---|---|---|
Boys | Â | n | 31 | 72 | 57 | 52 | 51 | 74 | 27 | 364 |
 | Height | Mean | 98.7 | 101.7 | 104.4 | 107.8 | 111.1 | 115.0 | 116.5 | 107.9 |
 | (cm) | SD | 3.2 | 3.7 | 4.2 | 4.4 | 4.7 | 4.6 | 4.6 | 7.2 |
 | Body mass | Mean | 15.7 | 16.7 | 17.4 | 18.7 | 19.4 | 20.8 | 21.6 | 18.6 |
 | (kg) | SD | 1.6 | 1.7 | 1.8 | 2.3 | 2.4 | 2.9 | 2.4 | 2.9 |
Girls | Â | n | 32 | 76 | 72 | 52 | 76 | 64 | 28 | 400 |
 | Height | Mean | 97.9 | 100.7 | 103.9 | 107.5 | 110.7 | 113.4 | 115.4 | 106.9 |
 | (cm) | SD | 2.9 | 3.9 | 4.1 | 3.7 | 3.9 | 6.9 | 4.5 | 7.1 |
 | Body mass | Mean | 15.4 | 16.1 | 17.2 | 18.2 | 19.4 | 20.1 | 21.3 | 18.2 |
 | (kg) | SD | 1.4 | 1.7 | 2.1 | 2.1 | 2.4 | 2.1 | 2.8 | 2.7 |