Operative Duration (hr)

Superficial SSI

Organ/Space SSI

OR

95% CI

P

OR

95% CI

P

<2

Ref

Ref

2 - 2.99

2.6

0.96 - 7.38

0.061

2.11

0.22 - 20.49

0.518

3 - 3.99

3.85

1.40 - 10.59

0.009*

1.75

0.16 - 19.53

0.648

4 - 4.99

4.39

1.50 - 12.88

0.007*

6.35

0.70 - 57.89

0.101

≥5

3.97

1.38 - 11.46

0.011*

9.72

1.18 - 80.22

0.035*