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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