Table 1.
Characteristics at baseline and 2-year follow-up of 546 Canadian children (244 girls and 302 boys) participating in the QUALITY (QUebec Adipose and Lifestyle InvesTigation in Youth) study
| Baseline | Follow-up | |||
|---|---|---|---|---|
| Variable | Mean | sd | Mean | sd |
| Age (years)† | 9·6*** | 0·9 | 11·6*** | 0·9 |
| BMI Z-score† | 0·7 | 1·0 | 0·7 | 1·1 |
| BMI (kg/m2)† | 19·4*** | 4·2 | 21·1*** | 4·9 |
| Fat mass index (kg/m2)† | 5·4*** | 3·3 | 6·3*** | 3·2 |
| Central fat mass index (kg/m2)† | 2·3*** | 1·7 | 2·8*** | 1·9 |
| % Body fat† | 26·0*** | 10·7 | 28·3*** | 10·8 |
| % Central body fat† | 11·0*** | 5·6 | 12·4*** | 5·7 |
| n | % | n | % | |
| Weight status‡ | ||||
| Normal | 326 | 59·7 | 329 | 60·3 |
| Overweight | 131 | 24·0 | 133 | 24·4 |
| Obese | 89 | 16·3 | 84 | 15·4 |
| MVPA <60 min/d‡ | 328*** | 67·6 | 343*** | 79·8 |
| Tanner stage§ >1‡ | ||||
| Girls | 87*** | 35·7 | 200*** | 82·3 |
| Boys | 24*** | 7·9 | 163*** | 5·5 |
| Total energy intake (kJ/d) | 7073 | 1663 | NA|| | |
| Total energy intake (kcal/d) | 1690·5 | 397·4 | NA|| | |
MVPA, moderate-to-vigorous physical activity; NA, not assessed.
*P<0·001.
†
Differences between baseline and 2-year follow-up tested using the paired t test.
‡
Differences between baseline and 2-year follow-up tested using the χ 2 test.
§
Tanner stage values ranged from 1 to 4 at baseline and from 1 to 5 at follow-up.
||
Data were not available at follow-up.