Table 3 Multivariate analysis of risk factors for organ-space surgical site infection in colon and rectal surgery

Male sex

1.57

1.14–2.15

0.004

Male sex

2.11

1.34–3.31

0.001

Laparoscopy

0.5

0.38–0.69

<0.001

Duration of operation ≥ p75th^a

1.49

1.03–2.15

0.07

NNIS ≥ 1

1.17

0.83–1.64

0.36

NNIS ≥ 1

1.1

0.74–1.66

0.6

Oral antibiotic prophylaxis

0.7

0.51–0.97

0.03

Oral antibiotic prophylaxis

0.49

0.32–0.73

0.001

Ostomy

2.65

1.8–3.92

<0.001