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Table 3 Risk of outcomes by mode of delivery (RCB vs. VBAC) from selected Sites (Guatemala, Belagavi, Nagpur, Pakistan and Bangladesh) of global network for Women’s and Children’s health research, maternal and newborn health registry

From: Maternal and perinatal outcomes of women with vaginal birth after cesarean section compared to repeat cesarean birth in select South Asian and Latin American settings of the global network for women’s and children’s health research

Characteristics

Women with a history of cesarean birth

VBAC

RCB

P-value*

Adjusted** P-value

Adjusted** RR (95% C.I.)

Mothers, N

8,267

1,389

6,878

   

Severe postpartum hemorrhage, n (%)

80/8,259 (1.0)

19/1,389 (1.4)

61/6,870 (0.9)

0.0577

0.0683

0.55 (0.29, 1.05)

Uterotonics, n (%)

6,685/8,237 (81.2)

845/1,388 (60.9)

5,840/6,849 (85.3)

0.0003

0.2384

1.07 (0.96, 1.19)

Blood transfusion, n (%)

602/8,266 (7.3)

21/1,389 (1.5)

581/6,877 (8.4)

< .0001

< .0001

3.74 (2.48, 5.63)

D&C or suction, n (%)

47/8,265 (0.6)

33/1,389 (2.4)

14/6,876 (0.2)

< .0001

< .0001

0.12 (0.06, 0.25)

Magnesium Sulfate, n (%)

205/8,232 (2.5)

7/1,388 (0.5)

198/6,844 (2.9)

0.0304

0.0748

1.93 (0.94, 3.99)

Hysterectomy, n (%)

28/8,265 (0.3)

1/1,389 (0.1)

27/6,876 (0.4)

0.1000

0.0757

10.54 (0.78, 141.70)

Severe perinatal infection, n (%)

112/8,266 (1.4)

18/1,389 (1.3)

94/6,877 (1.4)

0.7226

0.9015

1.03 (0.64, 1.66)

Severe postnatal infection/sepsis, n (%)

37/8,258 (0.4)

3/1,386 (0.2)

34/6,872 (0.5)

0.2291

0.1058

2.79 (0.80, 9.70)

Seizures/coma, n (%)

15/8,258 (0.2)

0/1,386 (0.0)

15/6,872 (0.2)

***

***

***

Unplanned hospitalization, n (%)

776/8,265 (9.4)

97/1,389 (7.0)

679/6,876 (9.9)

0.0272

0.9359

0.99 (0.79, 1.24)

Maternal death < 42 days, rate per 100,000 births

9 (109)

4 (288)

5 (73)

0.0301

***

***

Infants, N

8,335

1,398

6,937

   

Stillbirths, rate per 1,000 stillbirths plus live births

176 (21.1)

100 (72.0)

76 (11.0)

< .0001

< .0001

0.27 (0.15, 0.49)

Bag and mask resuscitation

395/8,298 (4.8)

60/1,372 (4.4)

335/6,926 (4.8)

0.6114

0.8938

1.02 (0.72, 1.45)

Baby breastfed within an hour

2,699/8,148 (33.1)

926/1,289 (71.8)

1,773/6,859 (25.8)

< .0001

< .0001

0.39 (0.30, 0.50)

Antibiotics

716/8,308 (8.6)

73/1,377 (5.3)

643/6,931 (9.3)

0.0003

0.0005

1.51 (1.20, 1.91)

CPAP

44/8,301 (0.5)

5/1,375 (0.4)

39/6,926 (0.6)

0.3936

***

***

Oxygen

647/8,306 (7.8)

75/1,378 (5.4)

572/6,928 (8.3)

0.0027

0.0319

1.31 (1.02, 1.67)

Neonatal mortality < 28 days, rate per 1,000 live births

185 (22.7)

54 (42.0)

131 (19.1)

< .0001

0.4734

0.86 (0.57, 1.30)

  1. * All analyses are performed using robust Poisson regression; All p-values are adjusted for the correlation within study cluster.** The relative risk is expressed as the risk of each outcome for RCB against the reference of VBAC. The relative risk is additionally adjusted for the factors in Table 1b that were significant at P < 0.1: maternal age, education, BMI, hypertension, interdelivery interval, parity, number of ANC visits, obstructed labor, delivery location, preterm birth; models of infant outcomes are additionally adjusted for measured birth weight.*** Analyses could not be performed due to zero or small cell sizes