Table 3 Multivariate analysis results for two definitions of unplanned pregnancy

  + 1 year

0.94 (0.92–0.97)

<  0.001

0.95 (0.93–0.98)

<  0.001

 Nuclear family

Ref

–

Ref

–

 Extended family

1.01 (0.75–1.37)

0.93

1.03 (0.77–1.38)

0.86

 Other

2.76 (1.12–6.76)

0.027

3.03 (1.21–7.60)

0.018

 1–2

Ref

–

Ref

–

  ≥ 3

2.26 (1.66–3.08)

<  0.001

2.19 (1.62–2.97)

<  0.001

 Never smoked

Ref

–

Ref

–

 Ex-smoker

1.06 (0.77–1.45)

0.72

1.02 (0.75–1.39)

0.90

 Current smoker

2.60 (1.26–5.35)

0.01

2.17 (1.06–4.45)

0.035

 No

Ref

–

Ref

–

 Yes

0.62 (0.47–0.83)

<  0.001

0.67 (0.51–0.88)

0.004

 No

Ref

–

Ref

–

 Yes

1.63 (1.24–2.16)

<  0.001

1.73 (1.32–2.28)

<  0.001