Table 2 Raw and adjusted prevalence ratios (PR) for repeat cesarean section in a subsequent pregnancy

 0–8

178 (71.77)

70 (28.23)

1

-

0.001

1

-

0.061

 9–11

107 (66.46)

54 (33.54)

1.1

0.88–1.59

0.61

0.39–0.95

 12 or more

17 (27.87)

44 (72.13)

2.55

1.98–3.29

0.76

0.46–1.27

 1st quintile

62 (77.50)

18 (22.50)

1

-

<0.0001

1

-

0.927

 2nd quintile

60 (80.00)

15 (20.00)

0.88

0.48–1.63

0.91

0.49–1.69

 3rd quintile

44 (68.75)

20 (31.25)

1.38

0.80–2.39

0.9

0.51–1.60

 4th quintile

54 (65.85)

28 (34.15)

1.51

0.91–2.51

0.93

0.51–1.70

 5th quintile

23 (35.94)

41 (64.06)

2.84

1.82–4.45

1.07

0.58–1.94

 0–5

65 (81.25)

15 (18.75)

1

-

<0.0001

1

-

0.05

 6–9

153 (71.16)

62 (28.84)

1.53

0.93–2.54

1.82

0.86–3.87

 10 or more

78 (46.99)

88 (53.01)

2.82

1.75–4.56

2.33

1.10–4.96

 <=20

193 (77.20)

57 (22.80)

1

-

<0.0001

1

0.051

 21–34

110 (49.77)

111 (50.23)

2.2

1.69–2.86

1.67

1.07–2.60

 35 or more

3 (33.33)

6 (66.67)

2.92

1.74–4.89

1.27

0.59–2.74

 Yes

25 (25.00)

75 (75.00)

1

-

<0.0001

1

-

<0.001

 No

281 (73.95)

99 (26.05)

2.87

2.34–3.54

2.27

1.44–3.60

 Yes

78 (69.64)

34 (30.36)

1

-

0.153

1

-

0.992

 No

228(61.96)

140 (38.04)

1.25

0.91–1.70

0.99

0.66–1.48

 White

218 (61.58)

136 (38.42)

1

-

0.261

-

-

-

 Black

68 (70.83)

28 (29.17)

0.75

0.54–1.06

 Other

20 (66.67)

10 (33.33)

0.86

0.51–1.46