Intervention group (n = 306) | Control group (n = 200) | P-value | |
---|---|---|---|
Boys, n (%) | 162 (53) | 99 (49) | 0.462 |
Age, years (SD) | 7.6 (0.4) | 7.6 (0.4) | 0.399 |
Parental education, n (%) | 0.564 | ||
Vocational school or less | 57 (19) | 43 (21) | |
Polytechnic | 139 (46) | 85 (43) | |
University | 107 (35) | 72 (36) | |
Household income, n (%) | 0.019 | ||
≤ 30,000 € | 51 (17) | 55 (28) | |
30,001–60,000 € | 132 (43) | 76 (39) | |
≥ 60,001 € | 117 (38) | 65 (33) |