Table 2 Univariate and multivariate associations of reproductive history and lifestyle factors with binge drinking in early pregnancy, n = 3,238

Parity

 Nullipara

820 (42)

1140 (58)

Ref.

Ref.

 Multipara

314 (25)

964 (75)

0.45

0.50 (0.39-0.62)

 Missing data: 0

Previous miscarriages

 Yes

247 (38)

407 (62)

1.16

0.81 (0.63-1.03)

 No

887 (34)

1697 (66)

Ref.

Ref.

 Missing data: 0

Time to pregnancy, months

 0-2

676 (40)

1032 (60)

Ref.

Ref.

 3-11

338 (36)

597 (64)

0.86

1.00 (0.79-1.26)

 ≥12

77 (18)

351 (82)

0.34

1.03 (0.68-1.57)

 Missing data: 167

Pregnancy planning

 Very planned

362 (25)

1100 (75)

Ref.

Ref.

 Fairly planned

386 (44)

499 (56)

2.35

1.78 (1.40-2.25)

 Neither planned nor unplanned

214 (44)

272 (56)

2.39

2.74 (2.01-3.73)

 Fairly unplanned

62 (53)

54 (47)

3.49

3.02 (1.78-5.10)

 Very unplanned Missing data: 155

66 (49)

68 (51)

2.95

2.87 (1.70-4.84)

Assisted reproductive technology (ART)

 Yes

32 (8)

370 (92)

0.13

0.12 (0.07-0.21)

 No

1051 (39)

1621 (61)

Ref.

Ref.

 Missing data: 164

Exercise

 Yes

760 (38)

1269 (62)

1.53

1.12 (0.89-1.43)

 No

242 (28)

617 (72)

Ref.

Ref.

 Missing data: 350

Alcohol before pregnancy, no of units/week

 0

96 (10)

864 (90)

Ref.

Ref.

 1

169 (29)

411 (71)

3.70

4.48 (3.14-6.40)

 2-7

727 (48)

780 (52)

8.39

10.23 (7.44-14.06)

 ≥8

135 (76)

43 (24)

28.26

33.18 (19.53-56.36)

 Missing data: 13

Smoking before pregnancy

 No

951 (33)

1943 (67)

Ref.

Ref.

 Yes

167 (54)

142 (46)

2.40

2.24 (1.59-3.15)

 Missing data: 230