Table 4 health behaviours of women actively planning pregnancy stratified by BMI

Smoking (n = 71,116)

 No

56,301

68.7% (68.0–69.3)

81.4% (81.3–81.6)

80.2% (80.0–80.4)

76.5% (76.3–76.7)

 Yes

14,815

31.3% (30.7–32.0)

18.6% (18.4–18.7)

19.8% (19.6–20.0)

23.5% (23.3–23.7)

 Question not answered

368

-

-

-

-

Illicit or recreational drug use (n = 71,328)

 No

68,934

94.6% (94.3–94.9)

96.2% (96.1–96.3)

97.1% (97.0–97.2)

97.0% (96.9–97.1)

 Yes

2394

5.4% (5.1–5.7)

3.8% (3.7–3.9)

2.9% (2.8–3.0)

3.0% (2.9–3.1)

 Question not answered

156

-

-

-

-

Alcohol consumption (n = 71,381)

 No

35,428

61.0% (60.3–61.7)

46.0% (45.8–46.2)

47.5% (47.2–47.7)

55.0% (54.7–55.2)

 Yes

35,953

39.0% (38.3–39.7)

54.0% (53.8–54.2)

52.5% (52.3–52.8)

45.0% (44.8–45.3)

 Question not answered

103

-

-

-

-

Caffeine consumption (n = 71,393)

 No

14,621

22.8% (22.2–23.4)

20.1% (19.9–20.2)

19.9% (19.7–20.1)

21.3% (21.1–21.4)

 Yes

56,772

77.2% (76.6–77.8)

79.9% (79.8–80.1)

80.1% (79.9–80.3)

78.7% (78.6–78.9)

 Question not answered

91

-

-

-

-

Weekly level of activity (n = 71,224)

 Less than 150 min of activity

30,261

40.9% (40.2–41.6)

38.4% (38.2–38.6)

42.7% (42.4–42.9)

47.8% (47.6–48.0)

 At least 150 min of moderate activity

31,041

43.5% (42.8–44.2)

45.8% (45.6–46.0)

43.9% (43.7–44.2)

40.4% (40.2–40.7)

 150 or more minutes of vigorous activity

9922

15.6% (15.1–16.1)

15.8% (15.7–16.0)

13.4% (13.2–13.6)

11.7% (11.6–11.9)

 Question not answered

260

-

-

-

-

Daily consumption of five portions of fruit and vegetables (n = 70,602)

 No

21,864

36.4% (35.7–37.1)

30.1% (29.9–30.3)

30.5% (30.3–30.7)

31.9% (31.7–32.1)

 Yes

38,307

46.8% (46.1–47.5)

55.4% (55.2–55.6)

54.9% (54.7–55.2)

53.0% (52.8–53.2)

 Don’t know

10,431

16.8% (16.3–17.4)

14.5% (14.3–14.6)

14.6% (14.4–14.8)

15.1% (15.0–15.3)

 Question not answered

882

-

-

-

-

Folic acid supplementation (n = 60,318)

 No

33,487

63.1% (62.4–63.8)

53.3% (53.1–53.5)

54.7% (54.4–54.9)

60.6% (60.3–60.9)

 Yes

26,831

36.9% (36.2–37.6)

46.7% (46.5–46.9)

45.3% (45.1–45.6)

39.3% (39.1–39.7)

 Question not answered

11,166

-

-

-

-