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Table 3 Postoperative Variables by acute kidney injury status

From: Mild increases in plasma creatinine after intermediate to high-risk abdominal surgery are associated with long-term renal injury

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