Table 1.
Anthropometric characteristics of the study population, according to sex and school grade
| N | Age (years) | Weight (kg) | Height (cm) | BMI (kg/m2) | Overweight including obesity (%)* | |
|---|---|---|---|---|---|---|
| Boys | ||||||
| Kindergarten | 3,980 | 5.5 (0.4) | 19.4 (3.5) | 112.8 (5.7) | 15.2 (2.0) | 9.7 (8.8 - 10.6) |
| 4th grade | 4,489 | 9.2 ( 0.4) | 29.5 (7.0) | 133.8 (6.3) | 16.3 (3.0) | 12.4 (11.5 - 13.4) |
| 7th grade | 4,262 | 12.5 (0.4) | 42.2 (11.0) | 151.8 (8.4) | 18.2 (3.7) | 13.2 (12.2 - 14.2) |
| 10th grade | 3,941 | 15.7 (0.4) | 57.7 (11.3) | 169.7 (7.6) | 20.0 (3.3) | 10.0 (9.0 - 10.7) |
| Girls | ||||||
| Kindergarten | 3,735 | 5.5 (0.4) | 19.0 (3.3) | 111.9 (5.8) | 15.1 (2.0) | 12.3 (11.2 - 13.3) |
| 4th grade | 4,411 | 9.2 (0.4) | 30.1 (7.8) | 133.8 (6.8) | 16.7 (3.4) | 17.8 (16.6 - 18.8) |
| 7th grade | 4,276 | 12.5 (0.4) | 46.0 (11.5) | 154.0 (7.2) | 19.2 (4.1) | 19.0 (17.8 - 20.2) |
| 10th grade | 4,246 | 15.7 (0.4) | 54.9 (11.9) | 160.2 (6.4) | 21.3 (4.2) | 18.1 (17.0 - 19.3) |
*Overweight and obesity are defined according to the IOTF criteria [9]
Results are expressed as mean (SD) for continuous variables and as percentage (95% confidence interval) for prevalence.