|
| Intervention | Control | ||
| PRE (n = 1166) | POST (n = 1191) | PRE (n = 123) | POST (n = 102) | |
| Age (years, mean ± SD) | 10.8 (0.71) | 11.0 (0.72) | 10.8 (0.72) | 11.1 (0.77) |
| Sex (%) |
|
|
|
|
| Male | 43.3 | 39.5 | 65.0** | 59.8** |
| Female | 56.7** | 60.5** | 35.0 | 40.2 |
| No. of cars in household (mean ± SD) | 1.6 (0.76) | 1.6 (0.76) | 1.6 (0.67) | 1.7 (0.66) |