Table 1.
Descriptive characteristics of the study sample
| Socio-economic statusa | |||
|---|---|---|---|
| Low (756–1773 Euro) | Middle (1773–2233 Euro) | High (2233–2943 Euro) | |
| Sex (%boys) | 285 (49.9%) | 298 (52.1%) | 276 (48.3%) |
| Lifestyle (3–6 years) | |||
| Diet | 19.8 ± 6.2 | 21.4 ± 6.1c | 22.2 ± 5.9c |
| Outdoor play (min/day) | 90.0 [17.0–180.0] | 90.0 [20.3–180.0] | 81.0 [20.3–180.0] |
| Screen time (min/day) | 63.0 [8.0–180.0] | 56.3 [8.3–139.5] | 49.9 [9.1–135.0] |
| Sleep (min/day) | 689.2 ± 27.6 | 688.5 ± 29.4 | 685.5 ± 28.5 |
| MVPA (min/day) | 66.1 ± 24.3 | 65.6 ± 25.0 | 62.2 ± 23.4 |
| Sedentary time (min/day) | 365.3 ± 51.6 | 372.6 ± 56.7 | 379.4 ± 55.0* |
| Overweight (5–6 years) | |||
| BMI (kg/m2) | 16.2 ± 1.6 | 16.0 ± 1.5 | 15.9 ± 1.3* |
| zBMI | 0.32 ± 0.84 | 0.25 ± 0.84 | 0.19 ± 0.78* |
| Weight status | |||
| Underweight | 25 (4.7%) | 28 (5.5%) | 36 (6.8%) |
| Normal weight | 447 (84.3%) | 433 (84.2%) | 449 (84.6%) |
| Overweight | 48 (9.1%) | 42 (8.2%) | 41 (7.7%) |
| Obesity | 10 (1.9%) | 11 (2.1%) | 5 (0.9%) |
| Overweight (10–11 years) | |||
| BMI (kg/m2) | 18.2 ± 3.0 | 17.9 ± 2.8 | 17.4 ± 2.4c |
| zBMI | 0.35 ± 1.1 | 0.25 ± 1.1 | 0.11 ± 1.0c |
| Weight statusc | |||
| Underweight | 64 (11.2%) | 70 (12.2%) | 72 (12.6%) |
| Normal weight | 395 (69.2%) | 389 (68.0%) | 431 (75.5%) |
| Overweight | 85 (14.9%) | 96 (16.8%) | 55 (9.6%) |
| Obesity | 27 (4.7%) | 17 (3.0%) | 13 (2.3%) |
| Socio-economic status | |||
| EHII (Euro) | 1525.9 ± 178.0 | 1985.4 ± 139.0c | 2457.4 ± 172.0c |
| Maternal education levelb,c | |||
| Low | 111 (19.7%) | 24 (4.5%) | 0 (0%) |
| Middle | 335 (59.5%) | 242 (44.8%) | 181 (37.0%) |
| High | 117 (20.8%) | 274 (50.7%) | 308 (63.0%) |
| Moved between measurements | |||
| Moved (% yes) | 101 (17.0%) | 87 (14.5%) | 96 (16.0%) |
MVPA, moderate-to-vigorous physical activity. Data are presented as mean ± SD, N(%) or median [95%CI]
aBased on tertiles of the Equivalized Household Income Indicator (EHII)
blow, no education–lower general secondary education; middle, senior secondary vocational education–higher general secondary education/pre-university education; high, higher vocational education–university
cSignificant difference between groups of socio-economic status, with the low socio-economic status group as the reference