Table 2 Bi variate analysis of cases and controls by selected present and past obstetric factors

Maternal age

 <25

32

20

2.25

1.07, 4.73

 26-30

42

59

1

1

Parity

 I

65

78

0.83

0.3, 2.31

 II

26

15

1.73

0.51, 5.89

 III and above

10

10

1

Gestational age in weeks

 <40

31

32

1.03

0.56, 1.97

 40

18

20

1.13

0.53, 2.39

 >40

52

51

1

Inter delivery interval

 <2yrs

17

9

1

 2.1-4

14

22

0.34

0.1,1.08

 4-6

24

30

0.42

0.14,1.23

 >6

46

42

0.58

0.21,1.58

History of stillbirth

 yes

10

21

1

 No

91

82

2.46

1.03,5.98

PAST C/S INDICATION

 Known

79

93

0.39

0.16, 0.92

 Unknown

22

10

1

Indication of the past cesarean section

 Fetal distress

16

25

0.29

0.1,0.86

Malpresentation

17

19

0.41

0.13,1.22

 Big baby

10

11

0.41

0.11,1.40

Failed Induction

10

14

0.32

0.09,1.12

 CPD

12

14

0.39

0.11, 1.38

 Others

14

10

0.64

0.18, 2.2

 Unknown

22

10

1

1

Health of baby of past C/S

 Live

95

87

2.91

1.01, 8.77

 Dead

6

16

1

Prior successful VBAC in the past

 Yes

20

7

3.39

1.27, 9.34

 No

81

96

1

SVD before c/s

 Yes

22

18

1.32

0.62, 2.79

 No

79

85

1

ROM at admission

 Yes

52

40

1.67

0.92, 3.03

 No

49

63

1

Duration of ROM

 <12hrs

40

25

6.4

1.46, 32.1

 >12 hrs

3

12

1

Presence of Meconium

 Yes

11

27

1

 No

90

76

2.19

1.28, 6.72

Cervical Dilation at admission in cm

 ≤ 3

28

70

1

 >3

73

33

5.53

2.91,10.56

Position of presenting part

 OA

38

21

1

 OP/PT

10

18

0.31

0.11, 0.86

 UK

53

64

0.46

0.23, 0.92

Duration of labour after admission in Hours

 <4 hrs

56

42

1

 >4 hrs

45

61

1.81

1, 3.28

Birth weight in grams

 <2500

7

3

5.83

0.48, 93.2

 2500-4000

92

95

2.42

0.4, 18.5

 >4000

2

5

1