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

From: Health behaviours in 131,182 UK women planning pregnancy

   Percentage of active planners (95% CI)
   BMI
  Number of active planners  < 18.5 (n = 2311) 18.5–24.9 (n = 28,710) 25–29 (n = 18,473) 30 + (n = 21,990)
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 - - - -