Table 2.
Anthropometric and body composition characteristics of study participants: children and adolescents (n 1519), KwaZulu-Natal, South Africa
| School grade 1 (age 7 years) | School grade 5 (age 11 years) | School grade 9 (age 15 years) | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| All (n 514) | Boys (n 264) | Girls (n 250) | All (n 503) | Boys (n 234) | Girls (n 269) | All (n 502) | Boys (n 182) | Girls (n 320) | ||||||||||
| Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | Median | IQR | |
| Age (years) | 6·9 | 6·8, 7·8 | 6·9 | 6·8, 7·9 | 6·9 | 6·8, 7·8 | 11·2 | 10·6, 12·3 | 11·6 | 10·9, 12·7 | 10·9 | 10·4, 11·8 | 15·2 | 14·5, 16·3 | 15·6 | 14·8, 16·8 | 15·1 | 14·5, 16·0 |
| Height (cm) | 118·7 | 114·3, 122·8 | 118·7 | 114·5, 123·3 | 118·6 | 114·1, 122·4 | 141·3 | 136·7, 146·9 | 141·5 | 136·7, 146·9 | 141·1 | 136·6, 146·9 | 159·5 | 154·1, 165·7 | 166·4 | 159·2, 170·8 | 157·0 | 152·7, 162·1 |
| Weight (kg) | 21·6 | 19·5, 23·8 | 21·8 | 19·6, 23·7 | 21·3 | 19·3, 23·9 | 33·7 | 30·4, 39·5 | 33·6 | 30·6, 38·8 | 34·0 | 30·4, 40·1 | 52·6 | 46·9, 59·4 | 52·7 | 47·6, 60·2 | 52·5 | 46·2, 58·6 |
| BMI (kg/m2) | 15·3 | 14·5, 16·3 | 15·3 | 14·6, 16·1 | 15·3 | 14·4, 16·7 | 16·9 | 15·7, 18·4 | 16·8 | 15·7, 17·9 | 17 | 15·9, 19·1 | 20·1 | 18·6, 22·5 | 19·5 | 18·0, 21·0 | 20·9 | 19·0, 23·6 |
| BMI-for-age Z-score (WHO)* | −0·18 | −0·77, 0·46 | −0·23 | −0·78, 0·38 | −0·15 | −0·76, 0·59 | −0·25 | −0·91, 0·41 | −0·42 | −0·99, 0·16 | −0·1 | −0·76, 0·63 | −0·03 | −0·68, 0·73 | −0·28 | −1·06, –0·28 | 0·31 | −0·50, 1·02 |
| Height-for-age Z-score (WHO 2007)* | −0·86 | −1·61, −0·07 | −0·88 | −1·66, −0·11 | −0·78 | −1·51, 0·06 | −0·68 | −1·43, −0·01 | −0·99 | −1·6, −0·23 | −0·51 | −1·26, 0·11 | −0·66 | −1·31, 0·06 | −0·76 | −1·51, −0·03 | −0·58 | −1·25, 0·08 |
| Body fat % (McCarthy 2006)† | 17·7 | 15·4, 20·7 | 16·8 | 15·0, 18·9 | 19·5 | 16·1, 22·2 | 15·8 | 12·3, 21·3 | 12·3 | 10·1, 14·6 | 20·3 | 16·7, 24·2 | 20·1 | 10·6, 26·6 | 9·0 | 6·5, 11·8 | 24·7 | 20·1, 29·5 |