Table 2.
Descriptive statistics for the height, weight, BMI, waist, prevalence of overweight including obesity, and obesity according to the independent variables
| Variable | Height | Weight | BMI | Waist | Overweight (including obesity) | Obesity | |
|---|---|---|---|---|---|---|---|
| Mean (SD) | Mean (SD) | Mean (SD) | Mean (SD) | % | % | ||
| Boys | |||||||
| Maternal education | Primary | −0.27 (1.00) | −0.23 (1.02) | −0.12 (0.99) | −0.15 (1.00) | 14.5 | 3.0 |
| Vocational | −0.15 (1.01) | −0.09 (1.02) | −0.03 (1.02) | −0.06 (1.03) | 18.5 | 4.1 | |
| Secondary | 0.07 (0.98) | 0.06 (0.98) | 0.03 (1.00) | 0.04 (0.98) | 19.5 | 5.2 | |
| University | 0.13 (0.99) | 0.05 (0.97) | −0.01 (0.99) | −0.01 (1.00) | 18.0 | 3.6 | |
| Paternal education | Primary | −0.14 (1.02) | −0.13 (0.97) | −0.07 (0.95) | −0.07 (0.96) | 16.7 | 2.6 |
| Vocational | −0.09 (1.01) | −0.05 (1.04) | −0.01 (1.03) | −0.02 (1.02) | 18.7 | 4.8 | |
| Secondary | 0.06 (0.98) | 0.05 (0.98) | 0.02 (1.00) | 0.01 (1.00) | 18.9 | 4.8 | |
| University | 0.17 (0.96) | 0.06 (0.92) | −0.02 (0.96) | −0.01 (0.96) | 17.6 | 2.8 | |
| Income per capita | ≤500 PLN | −0.12 (1.01) | −0.12 (1.01) | −0.08 (1.00) | −0.10 (1.00) | 16.5 | 3.8 |
| 501–1,000 PLN | 0.07 (0.99) | 0.06 (0.99) | 0.04 (1.00) | 0.04 (1.00) | 19.6 | 5.0 | |
| 1,001–1,500 PLN | 0.10 (0.97) | 0.14 (1.00) | 0.12 (1.02) | 0.12 (1.01) | 23.0 | 5.4 | |
| >1,500 PLN | 0.13 (0.95) | 0.10 (0.95) | 0.04 (0.98) | 0.03 (0.99) | 19.4 | 3.9 | |
| Number of children | 1 | 0.15 (0.97) | 0.24 (1.02) | 0.22 (1.05) | 0.21 (1.05) | 27.9 | 7.7 |
| 2 | 0.05 (0.99) | 0.06 (0.98) | 0.04 (1.00) | 0.04 (1.00) | 19.9 | 4.7 | |
| 3 | −0.01 (1.01) | −0.03 (0.99) | −0.04 (0.99) | −0.06 (0.99) | 16.5 | 4.0 | |
| 4 or more | −0.26 (0.98) | −0.29 (0.97) | −0.22 (0.97) | −0.23 (0.95) | 11.9 | 1.9 | |
| Dwelling | Rural | −0.07 (1.00) | −0.07 (1.00) | −0.04 (0.99) | −0.06 (0.98) | 17.7 | 4.1 |
| Urban | 0.02 (1.00) | 0.03 (1.00) | 0.02 (1.02) | 0.02 (1.01) | 18.9 | 4.5 | |
| Girls | |||||||
| Maternal education | Primary | −0.28 (1.06) | −0.06 (1.07) | 0.09 (1.00) | 0.10 (1.03) | 16.9 | 2.2 |
| Vocational | −0.17 (1.01) | −0.08 (1.06) | −0.01 (1.05) | 0.02 (1.06) | 14.3 | 3.2 | |
| Secondary | 0.00 (0.99) | −0.01 (1.00) | −0.01 (1.03) | −0.01 (1.02) | 14.6 | 3.3 | |
| University | 0.16 (0.98) | 0.06 (0.96) | −0.03 (0.98) | −0.01 (0.96) | 14.3 | 2.4 | |
| Paternal education | Primary | −0.26 (1.02) | −0.04 (1.07) | 0.09 (1.02) | 0.11 (1.05) | 16.4 | 3.4 |
| Vocational | −0.12 (1.02) | −0.05 (1.05) | 0.00 (1.04) | 0.02 (1.04) | 15.0 | 3.5 | |
| Secondary | 0.03 (0.97) | −0.02 (1.00) | −0.04 (1.02) | −0.02 (1.01) | 14.2 | 2.5 | |
| University | 0.19 (1.02) | 0.05 (0.93) | −0.03 (0.93) | −0.04 (0.94) | 13.0 | 1.7 | |
| Income per capita | ≤500 PLN | −0.15 (1.02) | −0.09 (1.03) | −0.03 (1.02) | −0.02 (1.03) | 13.7 | 2.7 |
| 501–1,000 PLN | 0.03 (0.98) | 0.07 (1.04) | 0.06 (1.07) | 0.08 (1.04) | 17.2 | 4.1 | |
| 1,001–1,500 PLN | 0.12 (0.98) | 0.00 (0.97) | −0.06 (0.99) | −0.04 (0.99) | 13.6 | 2.6 | |
| >1,500 PLN | 0.02 (1.05) | −0.01 (0.93) | −0.02 (0.90) | −0.07 (0.94) | 12.1 | 1.5 | |
| Number of children | 1 | 0.11 (1.00) | 0.12 (1.03) | 0.09 (1.04) | 0.12 (1.06) | 20.1 | 4.1 |
| 2 | 0.01 (1.01) | 0.04 (1.02) | 0.04 (1.04) | 0.04 (1.03) | 15.8 | 3.7 | |
| 3 | −0.10 (0.97) | −0.11 (1.01) | −0.09 (1.02) | −0.05 (1.00) | 12.8 | 2.4 | |
| 4 or more | −0.21 (1.03) | −0.14 (1.00) | −0.05 (0.97) | −0.05 (1.00) | 11.3 | 1.7 | |
| Dwellinga | Rural | −0.14 (1.01) | −0.08 (1.03) | −0.02 (1.03) | −0.01 (1.03) | 16.1 | 3.3 |
| Urban | −0.03 (1.01) | −0.02 (1.02) | −0.01 (1.02) | 0.01 (1.01) | 14.0 | 2.9 | |
aOnly pupils from primary and middle schools; height, weight, BMI, and waist expressed as z-score