Table 2 Alcohol use during subsequent antenatal visits before and after implementation of the practice change intervention

AUDIT-C score:

  Median (range)

0 (0 to 7)

0 (0 to 5)

-

AUDIT-C score^a:

No vs Some risk:

  No risk (0) (N (%))

1173 (89.68)

2304 (90.74)

0.80 (0.62, 1.03)

  Some risk (≥ 1) (N (%))

135 (10.32)

235 (9.26)

  Higher risk (≥ 3) (N (%))

6 (0.46)

5 (0.20)

Drinking frequency

[n = 2538]

-

  Never (N (%))

1173 (89.68)

2303 (90.71)

  Monthly or less (N (%))

111 (8.49)

202 (7.96)

  2-4x/month (N (%))

19 (1.45)

33 (1.30)

  2-3x/week (N (%))

4 (0.31)

0

   ≥ 4x/week (N (%))

1 (0.08)

0

N drinks per occasion:

[n = 135]

[n = 235]

-

  1–2 (N (%))

133 (98.52)

230 (97.87)

  3–4 (N (%))

1 (0.74)

2 (0.85)

  5–6 (N (%))

1 (0.74)

2 (0.85)

  7–9 (N (%))

0

1 (0.43)

   ≥ 10 (N (%))

0

0

Frequency of ≥ 5 drinks on 1 occasion:

[n = 135]

[n = 235]

-

  Never (N (%))

132 (97.78)

230 (97.87)

   < Monthly (N (%))

1 (0.74)

5 (2.13)

  Monthly (N (%))

2 (1.48)

0

  Weekly (N (%))

0

0

  Daily or almost daily (N (%))

0

0

Special occasion drinking¹ (N (%))

[n = 1087]

126 (11.59)

214 (8.43)

OR: 0.60 (0.46 to 0.79)