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Table 2 Maternal and neonatal complications of singleton pregnancies among women by pre-pregnancy obesity

From: Using appropriate pre-pregnancy body mass index cut points for obesity in the Chinese population: a retrospective cohort study

Outcomes

BMI<19(kg/m2)

19≤BMI<22(kg/m2)

22≤BMI<25(kg/m2)

25≤BMI<28(kg/m2)

BMI≥28(kg/m2)

P

N (%)

OR (95% CI)a

N (%)

Reference group

N (%)

OR (95% CI)a

N (%)

OR (95% CI)a

N (%)

OR (95% CI)a

for trend

Maternal complications

 GDM

424 (13.5)

0.87 (0.77-0.99)

896 (17.5)

1

584 (24.1)

1.34 (1.20-1.52)

193 (30.8)

1.82 (1.51-2.19)

76 (38.4)

2.73 (2.02-3.69)

<0.001

 Preeclampsia

62 (2.0)

0.85 (0.62-1.56)

119 (2.3)

1

85 (3.5)

1.53 (1.15-2.03)

37 (5.9)

2.64 (1.81-3.85)

12 (6.1)

2.71 (1.47-4.99)

<0.001

 PPH

163 (5.2)

0.73 (0.60-0.88)

355 (6.9)

1

161 (6.6)

0.97 (0.80-1.17)

52 (8.3)

1.25 (0.92-1.69)

12 (6.1)

0.88 (0.49-1.60)

0.008

Delivery mode

 OVD

293 (9.3)

1.28 (1.08-1.50)

350 (6.8)

1

152 (6.3)

0.99 (0.81-1.20)

24 (3.8)

0.63 (0.41-0.96)

2(1.0)

0.15 (0.04-0.62)

<0.001

 C/S

1235 (39.4)

0.77 (0.70-0.85)

2543 (49.7)

1

1403 (57.9)

1.24 (1.12-1.38)

409 (65.3)

1.56 (1.29-1.88)

133 (67.2)

1.88 (1.36-2.59)

<0.001

Neonatal complications

 Preterm birth

222 (7.1)

1.02 (0.86-1.22)

366 (7.2)

1

216 (8.9)

1.24 (1.04-1.47)

58 (9.3)

1.25 (0.93-1.67)

22 (11.1)

1.56 (0.99-2.46)

0.001

 LGA

220 (7.0)

057 (0.48-0.67)

605 (11.8)

1

416 (17.2)

1.53 (1.34-1.75)

142 (22.7)

2.14 (1.74-2.63)

49 (24.7)

2.42 (1.73-3.38)

<0.001

 SGA

260 (8.3)

1.47 (1.23-1.75)

291 (5.7)

1

104 (4.3)

0.76 (0.60-0.95)

18 (2.9)

0.51 (0.32-0.83)

6 (3.0)

0.53 (0.23-1.21)

<0.001

 Shoulder dystocia

1 (0.0)

0.06 (0.01-0.42)

27 (0.5)

1

7 (0.3)

0.58 (0.25-1.33)

2 (0.3)

0.68 (0.16-2.87)

1 (0.5)

1.04 (0.14-7.69)

0.102

 Low Apgar’s score

106 (3.4)

1.09 (0.85-1.41)

152 (3.0)

1

82 (3.4)

1.18 (0.90-1.55)

16 (2.6)

0.90 (0.53-1.51)

12 (6.1)

2.17 (1.18-3.98)

0.656

 Admission to NICU

665 (21.2)

0.99 (0.89-1.11)

1056 (20.7)

1

520 (21.5)

1.08 (0.96-1.22)

146 (23.3)

1.23 (1.01-1.50)

50 (25.3)

1.34 (0.97-1.86)

0.159

  1. BMI body mass index; GDM gestational diabetes mellitus; PPH Postpartum hemorrhage; OVD Operative vaginal delivery; C/S caesarean section; LGA large for gestational age; SGA small for gestational age; NICU neonatal intensive care unit; OR Odds ratio; CI confidence interval
  2. aData adjusted for maternal age and previous caesarean section.
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Reproductive Biology and Endocrinology

ISSN: 1477-7827

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