Table 4.
Postoperative outcomes of intraabdominal surgery patients by postoperative acute kidney injury risk category at a risk threshold of 9.0%.
| High AKI Risk | Low AKI Risk | P-Value | |||
|---|---|---|---|---|---|
| Outcome | 801 | (30%) | 1,890 | (70%) | |
| Acute Kidney Injury | 174 | (22%) | 60 | (3.2%) | <0.0001 |
| Acute Kidney Injury by KDIGO Stage | 0.07 | ||||
| Stage 1 | 123 | (71%) | 47 | (78%) | |
| Stage 2 | 26 | (15%) | 11 | (18%) | |
| Stage 3 | 25 | (14%) | 2 | (3.3%) | |
| Dialysis | 22 | (2.8%) | 0 | (0.0%) | <0.0001 |
| 30-Day Mortality | 32 | (4.0%) | 2 | (0.1%) | <0.0001 |
| Mechanical Ventilation | 43 | (5.4%) | 14 | (0.7%) | <0.0001 |
| Sepsis/Septic Shock | 61 | (7.6%) | 32 | (1.7%) | <0.0001 |
| Postoperative Location | <0.0001 | ||||
| Recovery Room | 618 | (78%) | 1791 | (95%) | |
| Intensive Care Unit | 173 | (22%) | 97 | (5.1%) | |
| Days to Discharge (Median [IQR]) | 7 | (4, 11) | 3 | (2, 6) | <0.0001 |
AKI, acute kidney injury; KDIGO, Kidney Disease: Improving Global Outcomes; IQR, interquartile range.
Predicted acute kidney injury risk was determined using the intraoperative model. Patients with predicted risk <9.0% were designated “low” risk, while those with predicted risk ≥9.0% were designated “high” risk.
Categorical variables expressed as counts (%) and compared with the chi-square test or Fisher’s test. Days to discharge expressed as median (IQR) and analyzed with Kruskall-Wallis test.