Demographic and clinical characteristics of children and their associations with BMI (N=6733)
| Variables | Normal weight (N=5316) | High BMI (N=1417) | p Value |
|---|---|---|---|
| Age (%), years | <0.001 | ||
| 9 | 26.7 | 33.1 | |
| 10 | 48.7 | 48.2 | |
| 11 | 24.6 | 18.7 | |
| Gender (male, %) | 49.3 | 50.5 | 0.440 |
| Weight in kg (m±SD) | 33.18±5.20 | 47.36±8.37 | <0.001 |
| Height in metres (m±SD) | 1.40±0.07 | 1.45±0.07 | <0.001 |
| Passive smoking (%) | 48.4 | 51.7 | 0.046 |
| Family history of allergic diseases (%) | 39.8 | 38.8 | 0.498 |
| Breastfeeding (%) | 48.2 | 48.4 | 0.894 |
| Day care outside the home (%) | 29.9 | 27.5 | 0.103 |
| Place of residence (%) | 0.009 | ||
| North of France | 48.1 | 51.9 | |
| South of France | 51.9 | 48.1 | |
| Number of siblings (%) | 0.910 | ||
| No siblings | 47.8 | 47.6 | |
| 1–2 siblings | 46.2 | 46.6 | |
| ≥3 siblings | 6.0 | 5.7 |
BMI, body mass index; m±SD, mean±SD; %, proportion within BMI.