Table 3.

Postoperative Variables by acute kidney injury status

Variables	No AKI (N = 706)	AKI stage 1 (N = 81)	AKI stage 2–3 (N = 28)	P-value
Length of stay in hospital (days)	9 [6–14]	15 [9–28]	17 [9–28]	< 0.001
Creatinine max during the first POD#7 (mg/dl)	0.8 [0.7–1.0]	1.4 [1.2–1.7]	2.8 [1.8–3.8]	< 0.001
Creatinine at hospital discharge	0.7 [0.6–0.9]	1.0 [0.8–1.2]	1.1 [0.8–1.5]	< 0.001
Creatinine at long-term follow up	0.9 [0.7–1.0]	1.0 [0.9–1.2]	1.1 [0.9–1.4]	< 0.001
Measurement of long-term follow up creatinine (days after surgery)	360 [303–393]	354 [298–376]	353 [294–386]	0.2
Minor complications; N (%)	146 (21%)	36 (44%)	14 (50%)	< 0.001
Superficial wound infection	19 (2.7%)	3 (3.7%)	0 (0%)
Urinary infection	33 (4.7%)	10 (12%)	5 (18%)
Paralytic ileus	20 (2.8%)	4 (4.9%)	5 (18%)
Pneumonia	13 (1.8%)	1 (1.2%)	2 (7.1%)
Postoperative confusion	20 (2.8%)	4 (4.9%)	3 (11%)
Other infection	72 (10%)	20 (25%)	7 (25%)
Major complications; N (%)	101 (14)	27 (33)	11 (39)	< 0.001
Anastomotic leakage	19 (2.7%)	5 (6.2%)	2 (7.1%)
Peritonitis	4 (0.57%)	1 (1.2%)	1 (3.6%)
Sepsis	22 (3.1%)	13 (16%)	5 (18%)
Necrosis stoma	8 (1.1%)	1 (1.2%)	0 (0%)
Wound dehiscence	9 (1.3%)	2 (2.4%)	1 (3.6%)
Bleeding requiring a redo surgery	24 (3.4%)	7 (8.6%)	1 (3.5%)
Pulmonary embolism	5 (0.71%)	1 (1.2%)	0 (0%)
Pulmonary oedema	7 (0.99%)	1 (1.2%)	1 (3.6%)
Acute coronary syndrome	0 (0%)	1 (1.2%)	0 (0%)
Atrial fibrillation / arrhythmia	15 (2.1%)	4 (4.9%)	1 (3.6%)
Stroke	0 (0%)	0 (0%)	0 (0%)
Renal replacement therapy	0 (0%)	0 (0%)	0 (0%)
Reoperation	35 (4.9%)	10 (12%)	3 (11%)
30-day mortality	0 (0%)	0 (0%)	0 (0%)

Values are medians [interquartiles rangees] or numbers (percentages %)