Table 1 Population characteristics in the ABCD cohort by ethnicity (n = 2769)
Population characteristics | Total population (n = 2769) | Dutch (n = 2283, 82.4%) | Surinamese (n = 116, 4.2%) | Moroccan (n = 112, 4.1%) | Turkish (n = 61, 2.2%) | other ethnicities (n = 197, 7.1%) |
|---|---|---|---|---|---|---|
Age, in year (Mean, SD) | 5.7, 0.5 | 5.7, 0.5 | 5.8, 0.5 | 6.0, 0.6 | 5.9, 0.5 | 5.7, 0.5 |
Boy, n (%) | 1415 (51.1) | 1166 (51.1) | 58 (50.0) | 64 (57.1) | 34 (55.7) | 93 (47.2) |
Socioeconomic status, n (%) | ||||||
 Low | 313 (11.3) | 145 (6.4) | 38 (32.8) | 48 (42.9) | 33 (54.1) | 49 (24.9) |
 Middle | 980 (35.4) | 759 (33.2) | 57 (49.1) | 55 (49.1) | 25 (41.0) | 84 (42.6) |
 High | 1476 (53.3) | 1379 (60.4) | 21 (18.1) | 9.(8.0) | 3 (4.9) | 64 (32.5) |
Maternal age (Mean, SD) | 32.3, 4.3 | 32.8, 3.8 | 30.6, 5.8 | 27.9, 4.9 | 27.1, 6.0 | 31.5, 4.8 |