Skip to main content

Table 3 Final model of the stepwise regression analysis

From: Risk-adjusted cesarean section rates for the assessment of physician performance in Taiwan: a population-based study

Risk factor

 

Model 1*

Model 2*

  

Crude OR (95% CI)

Adj. OR (95% CI)

Adj. OR (95% CI)

Multiple gestation

 

8.5 (7.9–9.1)

12.4 (11.5–13.5)

11.7 (10.7–12.8)

Multiparous

 

1.1 (1.1–1.2)

0.4 (0.4–0.4)

0.4 (0.4–0.4)

Gestation period (weeks)

< 37

1.9 (1.8–2.0)

-

-

 

≥ 42

1.1 (0.9–1.3)

2.2 (1.8–2.7)

2.4 (1.9–2.9)

Maternal age (years)

< 20

0.4 (0.4–0.5)

0.6 (0.5–0.6)

0.6 (0.5–0.6)

 

≥ 35

2.2 (2.1–2.2)

1.9 (1.9–2.0)

1.9 (1.8–2.0)

Malpresentation

 

206.8 (175.4–243.8)

468.0 (396.6–552.3)

481.2 (404.3–572.8)

Prolapsed cord

 

24.5 (9.9–60.7)

61.7 (24.4–156.1)

107.0 (32.9–347.9)

Antepartum hemorrhage, abruptio placenta, and previa placenta

 

35.3 (30.0–41.6)

95.6 (81.0–112.8)

86.9 (72.5–104.2)

Previous CS history

 

100.8 (92.6–109.7)

291.0 (266.6–317.7)

287.2 (261.6–315.3)

Insufficient or excessive fetal growth

 

6.9 (6.0–7.9)

13.1 (11.4–15.2)

13.0 (11.0–15.2)

Genital herpes

 

5.0 (3.0–8.2)

10.4 (6.1–17.7)

8.0 (4.4–14.5)

Diabetes mellitus

 

2.4 (2.1–2.8)

3.1 (2.5–3.7)

2.8 (2.3–3.5)

Anemia

 

2.9 (2.7–3.1)

3.6 (3.2–4.0)

3.3 (2.9–3.7)

Cardiac disease

 

3.2 (2.2–4.6)

6.0 (4.0–9.0)

5.1 (3.2–8.3)

Arterial hypertension

 

2.8 (2.4–3.3)

4.4 (3.7–5.3)

4.4 (3.6–5.4)

Eclampsia/preeclampsia

 

8.2 (7.2–9.4)

15.4 (13.4–17.8)

14.6 (12.5–17.1)

Polyhydramnios/oligohydramnios

 

2.5 (2.1–3.1)

3.5 (2.7–4.4)

3.7 (2.8–4.8)

Infection of amniotic cavity

 

6.5 (5.0–8.6)

11.3 (8.5–15.1)

11.5 (8.3–16.0)

Congenital/acquired abnormality of cervix or vagina

 

9.8 (4.6–20.8)

19.8 (8.9–44.0)

19.6 (8.7–44.6)

Premature labor

 

1.6 (1.5–1.7)

1.5 (1.4–1.6)

1.6 (1.4–1.7)

Premature rupture of the membrane

 

0.8 (0.8–0.9)

1.4 (1.3–1.5)

1.4 (1.3–1.5)

Cervical incompetence

 

1.8 (1.2–2.8)

2.8 (1.7–4.6)

-

  1. Note: * OR, odds ratio; CI, confidence interval.