Table 5 Adjusted odds ratios for associations between participant characteristics and knowledge of preconception risk factors

 18–24 years

(reference)

(reference)

(reference)

(reference)

(reference)

(reference)

 25–29 years

1.59 (0.87–2.88)

0.85 (0.51–1.41)

1.56 (0.98–2.48)

0.72 (0.38–1.37)

0.45 (0.18–1.12)

1.29 (0.51–3.24)

 30–34 years

3.42 (1.79–6.52) ‡

1.89 (0.94–3.78)

1.84 (1.06–3.18) §

0.93 (0.42–2.06)

0.89 (0.33–2.40)

1.05 (0.33–3.38)

 35–39 years

4.77 (2.41–9.43) ‡

1.28 (0.64–2.58)

1.44 (0.80–2.60)

0.67 (0.29–1.52)

0.84 (0.29–2.45)

1.68 (0.52–5.42)

 40–48 years

4.30 (2.10–8.80) ‡

1.27 (0.61–2.62)

1.77 (0.95–3.29)

0.61 (0.26–1.45)

0.41 (0.12–1.35)

1.30 (0.36–4.67)

  < £19,000

(reference)

(reference)

(reference)

(reference)

(reference)

(reference)

 £19,000–£25,999

0.83 (0.40,1.71)

1.00 (0.51–1.96)

0.92 (0.48–1.79)

1.35 (0.58–3.13)

1.13 (0.36–3.60)

1.07 (0.32–3.57)

 £26,000–£31,999

0.82 (0.38–1.76)

1.67 (0.78–3.54)

1.27 (0.66–2.47)

2.68 (0.93–7.70)

1.09 (0.33–3.61)

0.40 (0.08–2.10)

 £32,000–£47,999

1.01 (0.55–1.87)

1.50 (0.81–2.76)

1.38 (0.79–2.42)

1.25 (0.61–2.56)

0.66 (0.22–1.95)

0.66 (0.20–2.14)

 £48,000–£63,999

1.35 (0.73–2.49)

1.47 (0.79–2.74)

1.80 (1.03–3.15) §

1.25 (0.60–2.60)

0.91 (0.32–2.61)

0.92 (0.30–2.80)

 £64,000–£95,999

1.25 (0.67–2.31)

1.64 (0.86–3.10)

1.93 (1.10–3.39) §

1.26 (0.60–2.62)

0.75 (0.25–2.24)

1.11 (0.37–3.32)

  ≥ £96,000

1.20 (0.61–2.38)

1.39 (0.67–2.87)

3.11 (1.65–5.84) ‡

1.15 (0.50–2.64)

0.48 (0.12–1.89)

1.36 (0.41–4.54)

 School

(reference)

(reference)

(reference)

(reference)

(reference)

(reference)

 Intermediate

1.58 (0.78–3.22)

0.61 (0.30–1.22)

1.16 (0.62–2.16)

0.84 (0.35–1.99)

0.59 (0.21–1.69)

0.70 (0.20–2.44)

 University

2.37 (1.21–4.64) §

1.18 (0.59–2.35)

0.92 (0.51–1.65)

1.06 (0.46–2.44)

0.63 (0.23–1.72)

0.74 (0.22–2.42)

Minority ethnicity^b

0.89 (0.50–1.58)

0.74 (0.40–1.36)

0.82 (0.48–1.40)

1.04 (0.48–2.26)

0.47 (0.11–2.01)

0.50 (0.12–2.11)

Born outside the UK^b

0.52 (0.29–0.94) §

1.72 (0.80–3.70)

0.62 (0.36–1.08)

1.57 (0.66–3.78)

0.44 (0.10–1.88)

2.12 (0.89–5.05)

Ever pregnant^b

2.48 (1.70–3.62) ‡

1.19 (0.76–1.84)

1.10 (0.77–1.56)

1.20 (0.73–1.97)

1.99 (0.96–4.14)

0.46 (0.22–0.99) §

Previous live birth(s)^b

2.18 (1.47–3.22) ‡

0.98 (0.61–1.57)

1.27 (0.87–1.85)

1.20 (0.70–2.03)

2.15 (1.00–4.62)

0.38 (0.17–0.86) §

Adverse outcomes^b

2.49 (1.63–3.81) ‡

0.79 (0.49–1.27)

0.99 (0.66–1.49)

0.89 (0.51–1.56)

1.20 (0.56–2.55)

0.53 (0.20–1.44)

Previous infertility^b

1.38 (0.88–2.14)

0.84 (0.51–1.40)

1.28 (0.85–1.95)

1.02 (0.56–1.87)

0.95 (0.42–2.13)

1.39 (0.61–3.17)

 Definitely not

(reference)

(reference)

(reference)

(reference)

(reference)

(reference)

 Not sure/Don’t know

1.13 (0.70–1.84)

1.15 (0.66–1.98)

1.27 (0.80–1.99)

2.27 (1.12–4.63) §

2.50 (1.11–5.66) §

0.84 (0.34–2.10)

 In the next 3⁺ years

0.85 (0.45–1.59)

1.11 (0.59–2.10)

1.28 (0.74–2.20)

1.43 (0.66–3.10)

1.06 (0.33–3.36)

0.59 (0.19–1.80)

 Within 2 years

2.11 (1.30–3.43) ‡

1.39 (0.79–2.42)

1.62 (1.03–2.55) §

0.97 (0.52–1.79)

0.83 (0.31–2.22)

0.86 (0.34–2.13)