Table 5 Stepwise regression results of the effects of selected characteristics on C-section: Overall cases

Prolonged Labour

(No)

1.00

Yes

0.17^*

0.12–0.23

Previous C-section

(No)

1.00

Yes

20.53^*

10.23–24.92

Mother’s Education

(Primary and below)

1.00

Secondary

2.04^*

1.49–3.01

Higher

2.50^*

1.48–4.31

Mother’s Age: years

(<20)

1.00

20–24

1.35

0.82–1.82

25–29

2.85^*

1.42–4.12

30+

5.76^*

2.12–12.41

Order of Birth

(1)

1.00

2

0.70

0.48–1.01

3+

0.31^*

0.12–0.58

Duration of Taking Balance Diet

(Often)

1.00

One day per week

1.50^*

1.10–2.52

Rarely

1.87^*

1.32–2.85

Length of Baby’s: cm

(<45)

1.00

45+

1.46^*

1.11–2.24

Constant

0.66^*

0.23–1.57

Most influential variables among selected variables

Hazard ratio [Exp (β)]

95 % CI

Mother’s Age: years

(<20)

1.00

20–24

1.32^*

1.10–3.23

25–29

1.55^*

1.21–2.51

30+

2.25^*

1.25–3.35

Age at Marriage: years

(<18)

1.00

18–22

0.69^*

0.24–1.87

23+

1.10^*

0.54–2.56

Order of Birth

(1)

1.00

2

0.40^*

0.21–1.36

3+

0.34^*

0.16–1.53

Fetal Distress

(No)

1.00

Yes

1.21^*

0.69–2.14

Abdominal Operation

(No)

1.00

Yes

10.20^*

3.28–18.62