Table 1 Patient characteristics

Preoperative

n (%) (total n = 283)

 Sex, male

132 (47)

 Age, years

64 (49–74)^a

 BMI

21 (19–24)^a

 Charlson Comorbidity Index

1 (0–5)^a

 Immunosuppression

54 (19)

  Local solid malignant tumor

35 (12)

  Solid metastatic tumor or lymphoma

45 (16)

  No sepsis

204 (72)

  Sepsis

60 (21)

  Septic shock

19 (7)

 Hospital-acquired cIAI

62 (22)

Intraoperative

n (%)

 Delay from symptoms to operation < 24 h

79 (28)

  Gastroduodenal

32 (11)

  Small bowel

30 (11)

  Colorectal

101 (36)

  Appendix

109 (39)

  Gallbladder

11 (4)

  Laparotomy

152 (54)

  Laparoscopy

110 (39)

  Converted from laparoscopy to laparotomy

21 (7)

 Open abdomen

5 (2)

 Postoperative peritonitis

38 (13)

 Mannheim Peritonitis Index

26 (22–32)^a

 WSES Sepsis Severity Score

6 (3–9)^a

 APACHE-II

9 (6–15)^a

Postoperative

n (%)

 CRP, highest value, mg/l

304 (244–364)^a

 Reoperations

36 (13)

 Postoperative abscess

28 (10)

  0

111 (39)

  1

47 (17)

  2

38 (13)

  3a

28 (10)

  3b

25 (9)

  4a

7 (2)

  4b

3 (1)

  5

24 (8)

 Length of hospital stay, days

6 (3–11)^a

 ICU admission

57 (20)

  Renal replacement therapy

2 (1)

  Peak SOFA score at ICU

8 (6–10)^a

 Prolonged (> 12 h) recovery room stay

25 (9)

 Mortality, 30 days

29 (10)

 SCIAS or 30-day mortality

71 (25)

 Mortality, 90 days

37 (13)