Table 1.
Physiological characteristics of the study population (n 1743)
(Mean values and standard deviations)
| 6–7 months (n 316) | 8–9 months (n 289) | 10–11 months (n 221) | 12–24 months (n 474) | 25–36 months (n 443) | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Mean | sd | Mean | sd | Mean | sd | Mean | sd | Mean | sd | ||
| Age (months) | Boys | 6·8 | 0·6 | 8·9 | 0·6 | 10·8 | 0·5 | 17·9 | 3·5 | 30·0 | 3·8 |
| Girls | 6·8 | 0·7 | 8·9 | 0·6 | 10·9 | 0·5 | 17·5 | 3·4 | 30·3 | 3·5 | |
| P* | 0·543 | 0·740 | 0·027 | 0·235 | 0·392 | ||||||
| Length or height (cm) | Boys | 69·67 | 3·30 | 72·59 | 3·77 | 73·31 | 3·45 | 78·26 | 4·75 | 87·67 | 7·01 |
| Girls | 67·43 | 3·12 | 70·61 | 3·71 | 71·53 | 4·17 | 76·24 | 4·76 | 84·93 | 7·77 | |
| P* | <0·001 | <0·001 | 0·001 | <0·001 | <0·001 | ||||||
| Weight (kg) | Boys | 8·92 | 1·07 | 9·64 | 1·04 | 10·20 | 1·16 | 11·75 | 1·47 | 13·86 | 1·66 |
| Girls | 8·07 | 0·98 | 8·80 | 1·02 | 9·41 | 1·01 | 10·98 | 1·39 | 13·77 | 1·86 | |
| P* | <0·001 | <0·001 | <0·001 | <0·001 | 0·599 | ||||||
| BMI (kg/m2) | Boys | 18·38 | 2·04 | 18·36 | 2·23 | 19·04 | 2·38 | 19·22 | 2·60 | 18·22 | 3·17 |
| Girls | 17·78 | 2·15 | 17·73 | 2·41 | 18·45 | 2·55 | 18·86 | 2·56 | 19·57 | 4·17 | |
| P* | 0·012 | 0·023 | 0·083 | 0·146 | <0·001 | ||||||
* ANOVA test for the difference between boys and girls within the same age group.