Colon | Rectum | |||||
---|---|---|---|---|---|---|
Risk factor | No OS-SSI (n = 2318) | OS-SSI (n = 200) | p- value | No OS-SSI (n = 1043) | OS-SSI (n = 136) | p- value |
Age, median (IQR) years | 70 (61–79) | 73 (63–79) | 0.3 | 68 (60–76) | 66.5 (58–74) | 0.07 |
Age ≥ 65 years, (%) | 67.6 | 72 | 0.2 | 61.5 | 58.8 | 0.5 |
Male sex, (%) | 58.4 | 70 | 0.001 | 65.4 | 80.9 | <0.001 |
ASA ≥ III, (%) | 41.9 | 45.5 | 0.3 | 36.1 | 41.2 | 0.25 |
Correct IV antibiotic prophylaxis, (%) | 84.3 | 81.5 | 0.3 | 81.4 | 83.8 | 0.5 |
Duration of operation ≥ p75tha, (%) | 37.5 | 39 | 0.7 | 41.2 | 54.4 | 0.003 |
Laparoscopy, (%) | 61.6 | 44 | <0.001 | 66.3 | 64.7 | 0.7 |
NNIS ≥ 1, (%) | 35.5 | 43 | 0.03 | 32.7 | 41.2 | 0.05 |
Neoplasia, (%) | 93.6 | 93 | 0.7 | 97.2 | 94.9 | 0.13 |
Inflammatory bowel disease, (%) | 2.9 | 4 | 0.38 | 1.1 | 2.9 | 0.1 |
Chemotherapy, (%) | 3.1 | 3.5 | 0.7 | 45.1 | 45.2 | 1 |
Radiotherapy, (%) | 1.2 | 2.5 | 0.18 | 46 | 47.4 | 0.7 |
Oral antibiotic prophylaxis, (%) | 43.7 | 33 | 0.004 | 43.3 | 26.5 | <0.001 |
Mechanical bowel preparation, (%) | 71.4 | 67.2 | 0.2 | 89.1 | 90.4 | 0.6 |
Ostomy, (%) | 7.3 | 20 | <0.001 | 63.8 | 65.2 | 0.7 |