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Table 2 Pregnancy, labour and baby outcomes by maternal region of birth and obesity

From: Obesity and pregnancy outcomes: Do the relationships differ by maternal region of birth? A retrospective cohort study

  Number(%) Crude odds ratio (95 % CI) P value
Gestational Hypertension/PE/HELLP1 Syndrome
 Australian mothers without obesity 583(4.3 %) 1 -
 Australian mothers with obesity 586(11.3 %) 2.86(2.54–3.22) <0.001
 South Asian mothers without obesity 264(3.5 %) 0.82(0.71–0.95) 0.008
 South Asian mothers with obesity 45(5.1 %) 1.21(0.89 to 1.65) 0.23
Gestational Diabetes
 Australian mothers without obesity 433(3.2 %) 1 -
 Australian mothers with obesity 491(9.5 %) 3.20(2.80–3.65) <0.001
 South Asian mothers without obesity 794(10.6 %) 3.62(3.21–4.08) <0.001
 South Asian mothers with obesity 172(19.7 %) 7.44(6.14–9.02) <0.001
Preterm Birth
 Australian mothers without obesity 1256(9.2 %) 1 -
 Australian mothers with obesity 501(9.7 %) 1.06(0.95–1.18) 0.32
 South Asian mothers without obesity 441(5.9 %) 0.62(0.55–0.69) <0.001
 South Asian mothers with obesity 55(6.3 %) 0.66(0.50–0.87) 0.003
Dystocia
 Australian mothers without obesity 226(1.7 %) 1 -
 Australian mothers with obesity 101(2.0 %) 1.18(0.93–1.50) 0.17
 South Asian mothers without obesity 117(1.6 %) 0.94(0.75–1.18) 0.61
 South Asian mothers with obesity 29(3.3 %) 2.03(1.37–3.01) <0.001
Postpartum Haemorrhage 1000 ml
 Australian mothers without obesity 661(4.9 %) 1 -
 Australian mothers with obesity 372(7.2 %) 1.52(1.33–1.73) <0.001
 South Asian mothers without obesity 334(4.5 %) 0.92(0.80–1.05) 0.20
 South Asian mothers with obesity 49(5.6 %) 1.16(0.86–1.56) 0.33
Induced Labour
 Australian mothers without obesity 2955(21.7 %) 1 -
 Australian mothers with obesity 1496(29 %) 1.47(1.37–1.58) <0.001
 South Asian mothers without obesity 1727(23.1 %) 1.09(1.01–1.16) 0.02
 South Asian mothers with obesity 244(27.9 %) 1.39(1.20–1.62) <0.001
Instrumental Vaginal
 Australian mothers without obesity 1846(13.6 %) 1 -
 Australian mothers with obesity 478(9.3 %) 0.65(0.58–0.72) <0.001
 South Asian mothers without obesity 1284(17.2 %) 1.32(1.24–1.43) <0.001
 South Asian mothers with obesity 97(11.1 %) 0.79(0.64–0.99) 0.04
Unplanned Caesarean
 Australian mothers without obesity 1898(14 %) 1 -
 Australian mothers with obesity 1003(19.4 %) 1.49(1.37–1.62) <0.001
 South Asian mothers without obesity 1398(18.7 %) 1.42(1.32–1.53) <0.001
 South Asian mothers with obesity 210(24 %) 1.95(1.66–2.29) <0.001
Small for gestational age(<10th centile)
 Australian mothers without obesity 1449(10.7 %) 1 -
 Australian mothers with obesity 367(7.1 %) 0.64(0.57–0.72) <0.001
 South Asian mothers without obesity 1262(16.9 %) 1.71(1.57–1.85) <0.001
 South Asian mothers with obesity 90(10.3 %) 0.96(0.77–1.20) 0.73
Macroscomia(>4 kg)
 Australian mothers without obesity 1575(11.6 %) 1 -
 Australian mothers with obesity 994(19.3 %) 1.82(1.67–1.99) <0.001
 South Asian mothers without obesity 439(5.9 %) 0.48(0.43–0.53) <0.001
 South Asian mothers with obesity 111(12.7 %) 1.11(0.90–1.36) 0.32
Fetal compromise (pregnancy or labour)
 Australian mothers without obesity 3431(25.2 %) 1 -
 Australian mothers with obesity 1372(26.6 %) 1.07(1.00–1.15) 0.06
 South Asian mothers without obesity 2315(31 %) 1.33(1.25–1.42) <0.001
 South Asian mothers with obesity 279(31.9 %) 1.39(1.20–1.61) <0.001
Admission to NICU/SCN2
 Australian mothers without obesity 2664(19.5 %) 1 -
 Australian mothers with obesity 1238(24.1 %) 1.32(1.22–1.42) <0.001
 South Asian mothers without obesity 1455(19.6 %) 1.01(0.94–1.08) 0.85
 South Asian mothers with obesity 235(27 %) 1.53(1.31–1.79) <0.001
Any Perinatal Morbidity
 Australian mothers without obesity 5726(42 %) 1 -
 Australian mothers with obesity 2341(45.3 %) 1.14(1.07–1.22) <0.001
 South Asian mothers without obesity 3197(42.8 %) 1.03(0.97–1.09) 0.31
 South Asian mothers with obesity 49(50.2 %) 1.39(1.21–1.59) <0.001
Stillbirth
 Australian mothers without obesity 72(0.5 %) 1 -
 Australian mothers with obesity 31(0.6 %) 1.14(0.74–1.73) 0.56
 South Asian mothers without obesity 32(0.4 %) 0.81(0.55–1.23) 0.32
 South Asian mothers with obesity 6(0.7 %) 1.30(0.56–2.99) 0.54
  1. Number in bold reflect statistical significance
  2. Number(%)
  3. 1Pre-eclampsia(PE)
  4. 2Neonatal intensive care unit(NICU)/ Special care nursery(SCN)