Table 5 WSES sepsis severity score for patients with complicated Intra-abdominal infections (Range: 0–18)

• Severe sepsis (acute organ dysfunction) at the admission

3 score

• Septic shock (acute circulatory failure characterized by persistent arterial hypotension. It always requires vasopressor agents) at the admission

5 score

• Healthcare associated infection

2 score

• Colonic non-diverticular perforation peritonitis

2 score

• Small bowel perforation peritonitis

3 score

• Diverticular diffuse peritonitis

2 score

• Post-operative diffuse peritonitis

2 score

• Delayed initial intervention [Preoperative duration of peritonitis (localized or diffuse) > 24 h)]

3 score

• Age>70

2 score

• Immunosuppression (chronic glucocorticoids, immunosuppresant agents, chemotherapy, lymphatic diseases, virus)

3 score