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Table 2 Obstetric and baby outcomes among 61,800 women with singleton pregnancy giving birth from 28 weeks’ gestation divided into BMI groups; underweight, normal weight, overweight, obesity and severe obesity

From: Prolonged pregnancy and stillbirth among women with overweight or obesity – a population-based study in Sweden including 64,632 women

Outcome

BMI < 18.5 (underweight) n = 1729

n (%)

BMI 18.5–24.9 (normal weight) n = 39,000

n (%)

BMI 25.0–29.9 (overweight) n = 14,526

n (%)

BMI 30.0–34.9 (obesity) n = 4855

n (%)

BMI ≥ 35 (severe obesity) n = 1690

n (%)

Induction of labor

267 (15.4)

6625 (17.0)

3092 (21.3)

1259 (25.9)

503 (29.8)

Cesarean section (total)

265 (15.3)

7101 (18.2)

3285 (22.6)

1269 (26.1)

492 (29.1)

Pre-labor

143 (8.3)

3768 (9.7)

1634 (11.2)

609 (12.5)

210 (12.4)

In labor

122 (7.1)

3333 (8.5)

1651 (11.4)

660 (13.6)

282 (16.7)

Instrumental delivery

381 (22.0)

9525 (24.4)

3981 (27.4)

1477 (30.4)

540 (32.0)

Preterm delivery (< 37 + 0)

85 (4.9)

1496 (3.8)

586 (4.0)

229 (4.7)

91 (5.4)

Birth gestation > 41 + 6

76 (4.4)

2085 (5.3)

859 (5.9)

273 (5.6)

89 (5.3)

Apgar Score < 10 at 5 minc,a

184 (10.7)

4686 (12.0)

1966 (13.6)

758 (15.7)

280 (16.6)

Apgar Score < 7 at 5 minc,a

21 (1.2)

388 (1.0)

178 (1.2)

73 (1.5)

26 (1.5)

Apgar Score < 4 at 5 minc,a

8 (0.5)

135 (0.3)

54 (0.4)

30 (0.6)

9 (0.5)

Birthweight (mean)b

3325.3

3507.5

3575.5

3618.1

3669.3

Birthweight ≤ 10th centiled,b

306 (17.7)

4211 (10.8)

1374 (9.5)

399 (8.2)

110 (6.5)

Birthweight < 2SDe,b

102 (5.9)

1207 (3.1)

449 (3.1)

136 (2.8)

40 (2.4)

LGAb

18 (1.0)

1121 (2.9)

808 (5.6)

428 (8.8)

197 (11.7)

Admitted to NICU

133 (7.7)

2554 (6.5)

1100 (7.6)

425 (8.8)

166 (9.8)

  1. aData are missing for underweight 10 (0.6%), normal weight 79 (0.2%), overweight 39 (0.3%), obese 16 (0.3%), severe obese 4 (0.2%)
  2. bData are missing for underweight 3 (0.2%), normal weight 38 (0.1%), overweight 12 (0.1%), obese 7 (0.1%), severe obese 5 (0.3%)
  3. cNumber of stillbirths (Apgar 0): underweight 2 (0.1%), normal weight 58 (0.1%), overweight 22 (0.2%), obese 18 (0.4%), severe obese 2 (0.1%)
  4. dInternational definition of Small for Gestational Age (SGA) ≤ 10th centile for the gestational age
  5. eSwedish definition of Small for Gestational Age (SGA) < 2SD from the national reference mean
  6. Large for Gestational Age (LGA)
  7. NICU Neonatal intensive care unit