Table 2.

Characteristics of maternal alcohol use in alcohol-exposed and comparison pregnancies

Signs of abuse	Alcohol exposed (n = 84)	Comparison (n = 82)	P
Past 12 months
Tolerance ≥ 6 (‘hold’ version)*	67.1	1.4	< 0.001
AUDIT ≥ 6	27.4	0	< 0.001
TWEAK ≥ 2	69.6	1.4	< 0.001
Periconceptional period
AA per day	1.07 ± 1.4	0.02 ± 0.2	< 0.001
AA per drinking day	5.01 ± 4.6	2.96 ± 4.8†	NS
Pregnancy–last 2 weeks
AA per day	0.14 ± 0.3	0.0004 ± 0.002	< 0.001
AA per drinking day	2.23 ± 3.6	0.20 ± 0.000†	NS

Values are % or mean ± SD.

^*Tolerance ≥ 6 defined as self-reported ability to consume six or more standard drinks on an occasion before passing out or feeling too ill to continue.

^†Based on four women in the comparison group who reported any alcohol consumption (i.e. had any drinking day) in the periconceptional period and two women in the comparison group who reported any alcohol consumption in the most recent 2 weeks of pregnancy. AA, absolute ounces of alcohol; AUDIT, Alcohol Use Disorders Identification Test; NS, not significant; TWEAK, tolerance, worried, eye-opener, amnesia, cutdown.