Demographic factors associated with fatty acid ethyl ester (FAEE) concentrations
| Factor | FAEE ≤600 ng/g (n=137) | FAEE >600 ng/g (n=98) | p Value |
| Maternal age (years) | 30.2 (4.8) | 29.6 (5.3) | 0.33* |
| Primiparous mother, n (%) | 55 (40.1) | 47 (48.0) | 0.73† |
| White British, n (%) | 124 (91) | 84 (86) | 0.67† |
| Smoker, n (%) | 17 (12.4) | 23 (23.5) | 0.32‡ |
| DEPCAT score (median (IQR)) | 6.0 (4–7) | 6.0 (4–7) | 0.07 |
| Female | 75 (54.7) | 49 (50) | 0.59‡ |
| Birth weight (kg) | 3.46 (0.5) | 3.46 (0.5) | 0.90* |
| Occipital frontal head circumference (cm) | 34.7 (1.5) | 34.7 (1.5) | 0.83* |
| SVD, n (%) | 70 (51.1) | 49 (55) | 0.92† |
| Day of delivery | 0.39† | ||
| Month of delivery February | 13 (11.7) | 29 (24.8) | 0.02† |
All data mean (SD) unless otherwise stated.
*t-test, Mann-Whitney test
†χ2 test.
‡Fisher’s exact test.