Table 1.
Preoperative Characteristics of Patients With and Without AKI
| Variables |
All Patients (N=202) |
AKI+ (n=25) |
AKI− (n=177) |
P Value |
|---|---|---|---|---|
| Age, y | 70.3±11.7 | 72.5±8.7 | 70.0±12.0 | 0.49 |
| Women, No. (%) | 76 (37.6) | 10 (40.0) | 66 (37.3) | 0.79 |
| Body surface area, m2 | 1.60±0.20 | 1.55±0.27 | 1.61±0.18 | 0.28 |
| Body mass index, kg/m2 | 23.2±3.4 | 24.2±4.2 | 23.1±3.3 | 0.27 |
| Hypertension, No. (%) | 103 (51.0) | 13 (52.0) | 90 (50.9) | 0.91 |
| Diabetes mellitus, No. (%) | 59 (29.2) | 11 (44.0) | 47 (26.6) | 0.07 |
| Chronic lung disease, No. (%) | 21 (10.4) | 1 (4.0) | 20 (11.3) | 0.26 |
| Preoperative atrial fibrillation, No. (%) | 53 (26.2) | 5 (20.0) | 48 (27.1) | 0.45 |
| Redo operation, No. (%) | 15 (7.4) | 1 (4.0) | 14 (7.9) | 0.49 |
| Serum creatinine, mg/dL | 0.79±0.17 | 0.82±0.20 | 0.79±0.17 | 0.49 |
| eGFR, mL/min per 1.73m2 | 69.6±14.5 | 66.0±12.7 | 70.2±14.7 | 0.21 |
| Hemoglobin, g/dL | 13.6±1.4 | 13.0±1.5 | 13.7±1.3 | 0.019 |
| Brain natriuretic peptide, pg/mL | 74 (33–215) | 111 (47–213) | 69 (33–214) | 0.19 |
| LVEF, % | 60.3±12.7 | 57.1±14.1 | 60.8±12.5 | 0.23 |
| EuroSCORE II | 2.5±1.7 | 2.5±1.9 | 2.5±1.7 | 0.98 |
| Cleveland Clinical Foundation Score | 2.7±0.9 | 2.7±0.8 | 2.7±0.9 | 0.66 |
AKI indicates acute kidney injury; eGFR, estimated glomerular filtration rate; EuroSCORE, European System for Cardiac Operative Risk Evaluation; and LVEF, left ventricular ejection fraction.