Table 3

Demographic factors associated with ethyl glucuronide (EtG) concentrations

FactorEtG ≤30 ng/g
(n=200)
EtG>30 ng/g
(n=35)
p Value
Maternal age (years)30.0 (4.9)29.6 (5.3)0.68*
Primiparous mother, n (%)89 (44.5)13 (37.1)0.57†
White British, n (%)178 (89.4)30 (85.7)0.79†
Smoker, n (%)38 (19)7 (20.0)0.99‡
DEPCAT score
(median (IQR))
6.0 (4–7)6.0 (4–7)0.58
Female, n (%)106 (53)19 (54)1.0‡
Birth weight (kg)3.46 (0.5)3.48 (0.5)0.80*
Occipital frontal head circumference (cm)34.7 (1.4)34.7 (1.8)0.99*
SVD, n (%)107 (54)13 (37)0.23†
Day of delivery0.55†
Month of delivery0.1†
  • All data mean (SD) unless otherwise stated.

  • *t test, Mann-Whitney test.

  • †χ2 test.

  • ‡Fisher’s exact test.