Table 1 Risk factors for surgical site infection

Subcutaneous hematoma

11.6

8

Chorioamnionitis

5.6-10.6

21-23

American Society of Anesthesiologists class of 3 or greater

5.3

21

Tabacco

5.3

22

Incision length > 16.6 cm

4.9

24

Prenatal visit <7

4

25

Body Mass Index >35 kg/m2

3.7

26

Corticosteroid

3.1

24

Body Mass Index >30 kg/m2

2.0-2.8

21, 23, 24, 26-28

Subcutaneous tissue thickness > 3 cm

2.8

29

Second stage (vs. first stage)

2.8

30

Teaching service

2.7

8

No antibiotic prophylaxis

2.6

25

Pregestational Diabetes

1.4-2.5

26, 28, 31

Operating time ≥ 38 min

2.4

27

Hypertensive disease/Preeclampsia

1.7-2.3

21, 28

Duration of labor >12 h

2.0

23

Nulliparity

1.8

21

Twin

1.6

28

Premature rupture of membrane

1.5

28

Gestational diabetes

1.5

32

Blood loss (every 100 ml)

1.3

21

Previous cesarean delivery

1.3

32

Emergency delivery

1.3

28

Rupture of mambranes (each hour)

1.02

25