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Table 1 Association of maternal and obstetric characteristics with mode of birth (VBAC versus RCB), among births at selected sites (Guatemala, Belagavi, Nagpur, Pakistan and Bangladesh) at the global network for Women’s and Children’s health research, maternal and newborn health registry, 2017–2020

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*

Mothers, N

8,267

1,389

6,878

 

Maternal age, n

8266.0

1389.0

6877.0

0.0811

median (P25, P75)

26.0 (24.0, 30.0)

27.0 (24.0, 30.0)

26.0 (23.0, 30.0)

.

Maternal education, n (%)

8,266

1,389

6,877

< .0001

No formal schooling

1,114 (13.5)

269 (19.4)

845 (12.3)

 

Primary or secondary

6,092 (73.7)

1,012 (72.9)

5,080 (73.9)

 

University +

1,060 (12.8)

108 (7.8)

952 (13.8)

 

Parity

8,267

1,389

6,878

< .0001

1

5,229 (63.3)

634 (45.6)

4,595 (66.8)

 

2

1,990 (24.1)

351 (25.3)

1,639 (23.8)

 

> 2

1,048 (12.7)

404 (29.1)

644 (9.4)

 

BMI kg/m2

8,257

1,388

6,869

<.0001

< 18.5

1,093 (13.2)

201 (14.5)

892 (13.0)

 

18.5–24.9

3,899 (47.2)

692 (49.9)

3,207 (46.7)

 

≥ 25

3,265 (39.5)

495 (35.7)

2,770 (40.3)

 

Inter-delivery interval, n

8258.0

1388.0

6870.0

<.0001

median (P25, P75)

36.0 (25.0, 53.0)

32.0 (23.0, 47.0)

37.0 (25.0, 55.0)

 

At least one antenatal care visit, n/N (%)

7,879/8,267 (95.3)

1,314/1,389 (94.6)

6,565/6,878 (95.4)

<.0001

Antenatal care visits, n/N (%)

8,257

1,388

6,869

<.0001

0–3

2,441 (29.6)

568 (40.9)

1,873 (27.3)

 

≥ 4

5,816 (70.4)

820 (59.1)

4,996 (72.7)

 

Obstructed labor/failure to progress, n/N (%)

636/8,266 (7.7)

40/1,389 (2.9)

596/6,877 (8.7)

0.0061

Severe antepartum hemorrhage, n/N (%)

61/8,267 (0.7)

13/1,389 (0.9)

48/6,878 (0.7)

0.1308

Hypertensive disorders, n/N (%)

422/8,267 (5.1)

30/1,389 (2.2)

392/6,878 (5.7)

0.0005

Induction of labor, n/N (%)

80/7,967 (1.0)

48/1,334 (3.6)

32/6,633 (0.5)

< .0001

Delivery attendant**, n (%)

8,267

1,389

6,878

**

Physician

7,515 (90.9)

637 (45.9)

6,878 (100.0)

 

Nurse/nurse midwife/LHW/HW

227 (2.7)

227 (16.3)

0 (0.0)

 

Traditional birth attendant

481 (5.8)

481 (34.6)

0 (0.0)

 

Family/self/other

44 (0.5)

44 (3.2)

0 (0.0)

 

Delivery Location, n (%)

8,267

1,389

6,878

< .0001

Hospital

6,442 (77.9)

718 (51.7)

5,724 (83.2)

 

Clinic/Health center

1,123 (13.6)

164 (11.8)

959 (13.9)

 

Private Center

702 (8.5)

507 (36.5)

195 (2.8)

 

Infants, N

8,335

1,398

6,937

 

Female sex, n (%)

4,110/8,302 (49.5)

696/1,367 (50.9)

3,414/6,935 (49.2)

0.2942

Preterm birth, n (%)

1,432/8,325 (17.2)

277/1,388 (20.0)

1,155/6,937 (16.6)

0.0054

Measured birth weight, n

8258

1337

6921

0.0979

median (P25, P75)

2800.0 (2500.0, 3010.0)

2780.0 (2500.0, 3030.0)

2800.0 (2500.0, 3010.0)

 
  1. * With the exception of measured birth weight, all analyses are performed using robust Poisson regression, and p-values are adjusted for the correlation within study cluster. The comparisons of measured birth weight are performed using a Wilcoxon nonparametric test
  2. ** Statistical analysis not performed due to the lack of variation in the RCB group