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Table 3 Multivariable adjusted odds ratios (ORs) for pregnancy complications by parity and maternal age groups

From: Pregnancy complications among nulliparous and multiparous women with advanced maternal age: a community-based prospective cohort study in China

Variables

Nulliparas

Multiparas

30–34y (OR, 95% CI)

≥35y (OR, 95% CI)

30–34y (OR, 95% CI)

≥35y (OR, 95% CI)

Gestational hypertensiona

4.17 (2.76–6.14)*

8.44 (4.18–15.85)*

2.2 (1.68–2.88)*

0.97 (0.58–1.54)

Preeclampsia/eclampsiaa

2.39 (1.36–3.94)*

9.92 (4.87–18.78)*

1.91 (1.43–2.55)*

0.86 (0.48–1.42)

Gestational diabetesmellitus (GDM) b

2.22 (1.06–4.18)

1.08 (0.06–5.04)

1.74 (1.00–2.99)

3.29 (1.76–5.94)*

Anemiac

0.57 (0.22–1.18)

3.13 (1.19–6.84)

1.15 (0.83–1.57)

1.85 (1.25–2.69)*

Polyhydramniosc

1.81 (0.54–4.62)

6.8 (1.60–19.82)

1.86 (0.96–3.53)

3.29 (1.56–6.64)*

Oligohydramniosc

7.59 (3.73–14.74)*

3.03 (0.17–14.67)

1.11 (0.61–1.96)

1.36 (0.59–2.81)

Placenta previac

–

–

1.67 (1.08–2.54)

1.6 (0.84–2.82)

Premature rupture of membraneb

2.29 (0.93–4.82)

6.84 (2.00–17.69)*

2.89 (1.31–6.54)

5.14 (2.12–12.29)*

Infectious diseasec

–

–

1.09 (0.72–1.62)

1.08 (0.58–1.86)

Threatened abortiona

–

–

1.45 (0.99–2.09)

0.66 (0.31–1.27)

Preterm labord

1.22 (0.85–1.71)

1.54 (0.7–2.99)

1.27 (1.01–1.59)

1.89 (1.42–2.50)*

Low birth weighte

0.38 (0.02–1.77)

1.86 (0.1–8.93)

0.55 (0.39–0.77)*

0.78 (0.49–1.17)

Caesareane (ref. vaginal birth)

1.88 (1.5–2.36)*

4.06 (2.43–6.93)*

1.84 (1.61–2.11)*

1.65 (1.36–2.01)*

  1. Women aged 20–29 years were used as the reference group. * Indicate p-value was significant after Bonferroni correction
  2. aadjusted for annual income and BMI; badjusted for occupation; cadjusted for income; dadjusted for occupation and history of preterm labor; e adjusted for education and BMI
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