Table 4 Crude risks (%) and adjusted* odds ratios (ORs) for caesarean birth, by parity and previous caesarean status

20.9

1.01 (0.74,1.38)

8.3

0.82 (0.52,1.29)

12.6

1.25 (0.82,1.91)

22.9

1

11.0

1

11.9

1

28.3

1.23 (1.04,1.47)

13.5

1.38 (1.08,1.76)

14.8

1.10 (0.88,1.37)

36.8

1.95 (1.61,2.36)

19.1

2.29 (1.77,2.96)

17.6

1.45 (1.13,1.85)

20.1

0.89 (0.71,1.10)

7.6

0.77 (0.56,1.06)

12.4

0.99 (0.75,1.30)

22.8

1

10.3

1

12.6

1

29.8

1.36 (1.17,1.59)

15.7

1.40 (1.12,1.74)

14.1

1.23 (1.01,1.51)

22.3

0.96 (0.62,1.50)

12.9

0.76 (0.45,1.27)

9.4

1.53 (0.70,3.34)

25.9

1

19.7

1

6.2

1

34.9

1.37 (1.05,1.78)

27.4

1.36 (1.02,1.81)

7.5

1.18 (0.75,1.85)

45.1

2.29 (1.72,3.06)

37.7

2.41 (1.78,3.25)

7.3

1.13 (0.63,2.03)

23.6

0.87 (0.64,1.19)

15.4

0.79 (0.54,1.15)

7.9

1.08 (0.63,1.84)

25.9

1

19.5

1

6.4

1

33.5

1.35 (1.08,1.70)

26.9

1.43 (1.12,1.84)

6.6

0.98 (0.66,1.48)

3.5

0.84 (0.22,3.17)

2.6

1.41 (0.29,6.89)

0.9

0.37 (0.01,13.96)

4.8

1

2.1

1

2.7

1

6.6

1.01 (0.61,1.69)

4.2

1.38 (0.71,2.71)

2.4

0.66 (0.27,1.61)

9.7

2.03 (1.17,3.53)

5.3

2.26 (1.04,4.87)

4.4

1.73 (0.78,3.83)

3.4

0.79 (0.40,1.57)

1.0

0.45 (0.13,1.56)

2.4

1.20 (0.48,3.02)

4.5

1

2.5

1

2.0

1

8.0

1.75 (1.13,2.71)

4.4

1.75 (0.96,3.20)

3.5

1.68 (0.85,3.32)

77.3

1.37 (0.43,4.36)

6.9

1.13 (0.06,20.79)

70.4

1.26 (0.43,3.65)

77.9

1

5.9

1

72.1

1

84.3

1.53 (0.85,2.77)

8.0

1.67 (0.61,4.62)

76.3

1.18 (0.69,2.01)

82.3

1.50 (0.77,2.91)

9.7

2.01 (0.71,5.66)

72.7

1.08 (0.62,1.91)

82.2

1.14 (0.57,2.29)

8.5

1.22 (0.39,3.79)

73.7

1.05 (0.55,2.00)

80.0

1

7.6

1

72.4

1

79.8

1.03 (0.62,1.71)

6.4

0.76 (0.29,1.96)

73.4

1.14 (0.71,1.81)