Table 3 Multiple logistic regression model for delivered women including variables related to delivery record

 1

1(ref)

1(ref)

 2

1.81 (1.04, 3.16)

0.04

2.39 (1.26, 4.51)

0.01

2.27 (1.11, 4.66)

0.03

 >41

1(ref)

1(ref)

 <30

2.92 (0.82, 10.45)

0.10

2.07 (0.52, 8.23)

0.30

 30–40

1.13 (0.48, 2.67)

0.78

0.99 (0.39, 2.50)

0.98

 Junior

1(ref)

1(ref)

 Intermediate

0.76 (0.25, 2.27)

0.62

0.96 (0.31, 3.00)

0.94

 Senior

1.37 (0.37, 5.07)

0.64

1.77 (0.45, 6.91)

0.41

 College degree or less

1(ref)

1(ref)

 Bachelor/master degree

2.03 (0.90, 4.59)

0.09

2.12 (0.90, 4.98)

0.09

 1–5

1(ref)

1(ref)

 6–10

1.67 (0.72, 3.90)

0.24

1.82 (0.76, 4.37)

0.18

  ≥ 11

1.23 (0.46, 3.29)

0.68

1.43 (0.51, 4.02)

0.50

 Contract staff

1(ref)

1(ref)

 Formal staff

1.09 (0.57, 2.06)

0.80

1.07 (0.54, 2.10)

0.86

 < 5000

1(ref)

1(ref)

  5000-10,000

1.14 (0.36, 3.68)

0.82

1.21 (0.37, 3.98)

0.76

 >10,000

2.31 (0.66, 8.05)

0.19

2.62 (0.73, 9.37)

0.14

 No

1(ref)

1(ref)

 Yes

2.84 (1.02, 7.92)

0.05

3.03 (1.07, 8.57)

0.04

 Vaginal delivery

1(ref)

 Cesarean section

0.63 (0.31, 1.28)

0.20

 Yes

1(ref)

 No

0.79 (0.32, 1.94)

0.61

 Yes

1(ref)

 No

0.94 (0.51, 1.73)

0.83

 Preschool (3–5)

1(ref)

 Infant (<3)

2.81 (1.34, 5.92)

0.01

 School-age (≥6)

1.18 (0.44, 3.16)

0.74