Table 1 ABCD study: sample characteristics (N = 5238) according to the level of alcohol intake during pregnancy
|  | Total N = 5238 | Abstainer N = 3049 (58.2%) | Non-daily drinker N = 1894 (36.2%) | Daily drinker N = 295 (5.6%) | P for trend |
|---|---|---|---|---|---|
Maternal education (years) | 9.6 (3.7) | 8.7 (3.9) | 10.8 (3.0) | 10.8 (3.3) | <0.001 |
Smoking during pregnancy (% yes) | 9.4 | 9.1 | 8.8 | 16.9 | 0.013 |
Maternal height (cm) | 169.2 (7.1) | 168.1 (7.3) | 170.7 (6.5) | 170.7 (6.5) | <0.001 |
Maternal BMI (kg/m2) | 22.8 (3.8) | 23.3 (4.2) | 22.2 (3.1) | 22.3 (3.2) | <0.001 |
Maternal age (years) | 31.4 (4.8) | 30.5 (5.3) | 32.5 (3.6) | 32.9 (3.9) | <0.001 |
Parity (% >0) | 42.8 | 42.4 | 42.7 | 47.1 | 0.280 |
Hypertensive disorders (% yes) | Â | Â | Â | Â | Â |
 Pregnancy hypertension | 9.8 | 11.1 | 8.1 | 7.5 | <0.001 |
 Preexisting hypertension | 3.4 | 3.8 | 3.0 | 2.4 | |
Mental distress (% high) | 15.5 | 17.0 | 13.2 | 15.0 | 0.003 |
Ethnicity (%) | Â | Â | Â | Â | Â |
 Dutch | 72.2 | 65.3 | 82.0 | 80.0 | <0.001 |
 Mediterranean | 6.5 | 8.0 | 4.4 | 4.7 | |
 Creole | 6.0 | 10.1 | 0.1 | 1.0 | |
 Other | 15.3 | 16.5 | 13.5 | 14.2 |