Table 1.
Description of the sample in terms of risk factors for chronic disease at 15 years of age
| Risk factors for chronic diseases | All | Boys | Girls | p |
|---|---|---|---|---|
| Body mass index (Z score) | .001 | |||
| Normal (>1) | 72.4% | 70.4% | 74.4% | |
| Overweight (1–1.99) | 18.9% | 19.4% | 18.5% | |
| Obesity (≥2) | 8.7% | 10.2% | 7.2% | |
| Active mode of transport to school | 73.4% | 77.2% | 69.8% | <.001 |
| ≥300 min/wk of LTPA | 38.1% | 54.0% | 23.0% | <.001 |
| Smoking | 6.0% | 4.8% | 7.1% | .001 |
| Alcohol consumption | .003 | |||
| Never | 75.1% | 77.4% | 73.0% | |
| Less than once a week | 20.2% | 18.1% | 22.2% | |
| Weekly or more frequently | 4.7% | 4.5% | 4.8% | |
| Systolic blood pressure (mean ± SD) | 119.4 (9.8) | 123.3 (10.3) | 115.5 (10.4) | <.001 |
| Diastolic blood pressure (mean ± SD) | 67.6 (6.2) | 66.4 (4.7) | 68.9 (7.2) | <.001 |
LTPA = leisure-time physical activity; SD = standard deviation.