Table 5 90-days uni- and multivariable survival analysis

Acute Kidney Injury

5.19 (3.35–8.03)

 < 0.0001

4.45 (2.69–7.39)

 < 0.0001

Baseline s-creatinine, µmol l ⁻¹

2.77 (1.92- 3.98)

 < 0.0001

2.20 (1.35–3.59)

0.002

Age group

 < 0.0001

 < 0.0001

  < 60

1.00 (ref)

1.00 (ref)

  > 60–70

3.39 (1.32–8.74)

1.53 (0.52–4.49)

  > 70–80

8.55 (3.57–20.45)

6.23 (2.37–16.38)

  > 80

9.37 (3.88–22.63)

5.16 (1.92–13.89)

Female

1.30 (0.83–2.03)

0.25

1.18 (0.72–1.95)

0.43

Charlson Comorbidity Index

 < 0.0001

0.001

  0

1.00 (ref)

1.00 (ref)

  1–2

2.88 (1.60–5.17)

2.64 (1.37–5.07)

  > 2

5.58 (3.02–10.31)

4.37 (2.17–8.81)

Type of Surgery

0.06

0.10

  Upper gastrointestinal

1.00 (ref)

1.00 (ref)

  Small intestine with resection

0.52 (0.25–1.07)

0.60 (0.27–1.31)

  Colon with resection

0.57 (0.26–1.24)

0.91 (0.37–2.27)

  Laparotomy (no resection)

0.34 (0.17–0.68)

0.39 (0.18–0.88)

  Combined small intestine and colon

0.48 (0.18–1.30)

1.29 (0.45–3.67)

  Other

0.21 (0.026–1.59)

0.44 (0.06–3.53)

Peritoneal Contamination

0.002

0.35

  None

1.00 (ref)

1.00 (ref)

  Minimal

1.45 (0.77–2.72)

1.35 (0.69–2.65)

  Local pus/abscess

1.83 (0.88–3.79)

1.63 (0.73–3.63)

  Diffuse pus or faeces

2.83 (1.67–4.80)

1.26 (0.621–2.54)

qSOFA ^a

0.04

0.18

  0

1.00 (ref)

1.00 (ref)

  1

1.01 (0.60–1.70)

0.95 (0.56–1.62)

  ≥ 2

2.28 (1.15–4.50)

1.90 (0.92–3.93)