Table 7 Multivariate analysis on pregnancy complications and pregnancy outcomes

B (95% CI)

B (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

OR (95% CI)

 ≤ 39

Reference

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Reference

 40–44

−38.44 (−46.36 - -30.53)

−0.12 (− 0.15 - -0.10)

1.58 (1.39–1.79)

1.97 (1.79–2.18)

1.52 (1.40–1.64)

1.22 (1.18–1.26)

1.62 (1.20–2.19)

 ≥ 45

−97.49 (−123.94 - -71.05)

−0.39 (− 0.47 - -0.30)

2.00 (1.43–2.80)

2.90 (2.27–3.70)

2.49 (2.05–3.02)

1.43 (1.29–1.59)

2.28 (1.05–4.93)

 Single status at registration

−85.60 (−99.15 - -72.06)

−0.09 (− 0.14 - -0.05)

0.72 (0.57–0.92)

1.03 (0.87–1-22)

1.02 (0.89–1.16)

1.13 (1.07–1.20)

1.32 (0.81–2.12)

 Married/cohabiting

Reference

Reference

Reference

Reference

Reference

Reference

Reference

 Yes

−31.26 (−48.89 - -13.63)

−0.20 (−0.26 - -0.14)

1.12 (0.89–1.42)

1.11 (0.90–1.37)

1.53 (1.34–1.75)

1.46 (1.36–1.56)

1.63 (0.94–2.82)

 No

Reference

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Reference

Reference

Reference

Reference

Reference

 Primiparous

Reference

Reference

Reference

Reference

Reference

Reference

Reference

 Multiparous

158.85 (149.87–167.84)

−0.06 (−0.10 - -0.04)

0.50 (0.44–0.57)

1.22 (1.07–1.40)

0.42 (0.38–0.45)

0.70 (0.67–0.72)

1.16 (0.80–1.70)

 No

Reference

Reference

Reference

Reference

Reference

Reference

Reference

 Yes

−3.88 (−3.97- -3.80)

−3.09 (−3.15- -3.03)

1.48 (1.14–1.92)

1.042 (0.80–1.31)

4.93 (4.40–5.53)

4.89 (4.57–5.24)

8.67 (6.10–12.32)

 Normal

Reference

Reference

Reference

Reference

Reference

Reference

Reference

 Underweight

− 232.52 (− 262.07 - -202.97)

−0.34 (−0.43 - −0.24)

0.60 (0.28–1.26)

0.92 (0.49–1.74)

0.71 (0.47–1.08)

1.09 (0.96–1.24)

–

 Overweight

81.97 (73.57–90.37)

0.03 (−0.02–0.03)

1.66 (1.44–1.91)

2.21 (1.94–2.52)

1.61 (1.48–1.76)

1.21 (1.17–1.26)

1.25 (0.90–1.74)

 Obese

129.14 (118.47–139.80)

-0-11 (− 0.14 - -0.07)

2.89 (2.49–3.36)

7.18 (6.37–8.10)

2.88 (2.62–3.17)

1.66 (1.59–1.73)

1.50 (1.02–2.22)