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Table 1 Participant characteristics, health behaviours and numbers of women who provided a response

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

  Number of women Percentage of women
Age
 18–24 47,977 37.8%
 25–34 64,684 50.9%
 35–40 12,905 10.2%
 41 +  1,536 1.2%
 Question not answered 4,080 -
BMI
  < 18.5 3,826 3.5%
 18.5–24.9 46,739 42.1%
 25–29 28,559 25.7%
 30 +  31,908 28.7%
 BMI excluded 5,874 -
 Question not answered 14,276 -
Smoking
 No 101,611 80.0%
 Yes 25,445 20.0%
 Question not answered 4,126 -
Illicit or recreational drug use
 No 122,288 96.3%
 Yes 4,698 3.7%
 Question not answered 4,196 -
Alcohol consumption
 No 57,772 45.5%
 Yes 69,195 54.5%
 Question not answered 4,215 -
Caffeine consumption
 No 25,921 20.4%
 Yes 100,901 79.6%
 Question not answered 4,360 -
Weekly level of activity
 Less than 150 min of activity 49,072 42.0%
 At least 150 min of moderate activity 50,813 43.5%
 150 or more minutes of vigorous activity 16,948 14.5%
 Question not answered 14,349 -
Daily consumption of five portions of fruit and vegetables
 No 36,590 31.6%
 Yes 61,747 53.3%
 Don’t know 17,463 15.1%
 Question not answered 15,388 -
Folic acid supplementation
 No 68,033 68.5%
 Yes 31,329 31.5%
 Question not answered 31,820 -
Physical health conditiona
 No 98,316 85.1%
 Yes 17,166 14.9%
 Question not answered 15,700 -
Has a Physical health condition and consulted doctor or specialist about pregnancy plans
 No 10,151 59.4%
 Yes 6,942 40.6%
 Question not answered 114,089 -
  1. aThis could include asthma, high blood pressure, heart problems, auto-immune conditions, acne, pre-eclampsia, gestational diabetes or epilepsy