Variable | Boys | Girls | P-value |
---|---|---|---|
 | (n=885) | (n=846) |  |
Age (years) | 12.3 (0.4) | 12.3 (0.4) | 0.631 |
Height (cm) | 154.4 (8.1) | 152.5 (6.0) | <0.001 |
Weight (kg) | 44.5(9.7) | 43.6 (7.9) | 0.040 |
Body mass index (kg/m2) | 18.5 (3.0) | 1837 (2.7) | 0.276 |
Actual weight (%) | Â | Â | Â |
 Underweight | 73 (8.2) | 88 (10.4) | 0.116 |
 Normal weight | 694 (78.4) | 666 (78.7) |  |
 Overweight | 118 (13.3) | 92 (10.9) |  |
Self-perceived weight status (%) | Â | Â | Â |
 Thin | 268 (30.3) | 139 (16.4) | <0.001 |
 Normal | 484 (54.7) | 560 (59.8) |  |
 Heavy | 133 (15.0) | 201 (23.8) |  |
Body image perception (%) | Â | Â | Â |
 Underestimated | 230 (26.0) | 99 (11.7) | <0.001 |
 Correct | 605 (68.4) | 591 (69.9) |  |
 Overestimated | 50 (5.6) | 156 (18.4) |  |