Table 1 Preoperative characteristics of and intraoperative interventions in patients
Characteristics | AKI (n = 20) | No AKI (n = 80) | P value |
|---|---|---|---|
Demographic data | |||
Age, years | 75.3 ± 4.1 | 68.1 ± 9.7 | <0.001 |
Female, number (percentage) | 6 (30.0) | 33 (41.0) | 0.36 |
Body mass index | 29.7 ± 4.3 | 27.4 ± 4.5 | 0.045 |
Comorbidities | |||
Preoperative serum creatinine, μmol/L | 96.1 ± 31.6 | 89.4 ± 24.0 | 0.30 |
Preoperative estimated glomerular filtration rate < 60 mL/minute, number (percentage) | 8 (40.0) | 19 (23.8) | 0.14 |
Left ventricular dysfunction (ejection fraction < 40%), number (percentage) | 7 (35.0) | 18 (22.5) | 0.25 |
Arterial hypertension, number (percentage) | 20 (100.0) | 64 (80.0) | 0.029 |
Hypercholesterolemia, number (percentage) | 16 (80.0) | 46 (57.5) | 0.06 |
Atrial fibrillation, number (percentage) | 10 (50.0) | 16 (20.0) | 0.006 |
Myocardial infarction (within 6 months preoperatively), number (percentage) | 7 (35.0) | 13 (16.3) | 0.06 |
Chronic obstructive pulmonary disease, number (percentage) | 6 (30.0) | 8 (10.0) | 0.021 |
Peripheral vascular disease, number (percentage) | 4 (20.0) | 2 (2.5) | 0.013 |
Diabetes mellitus, number (percentage)a | 8 (40.0) | 20 (25.0) | 0.18 |
Intervention | |||
Coronary artery bypass grafting surgery, number (percentage) | 7 (35.0) | 18 (22.5) | 0.25 |
Valvular surgery, number (percentage) | 7 (35.0) | 45 (56.3) | 0.09 |
Simultaneous coronary revascularisation and valve surgery, number (percentage) | 6 (30.0) | 11 (13.8) | 0.08 |
Duration of cardiopulmonary bypass (minutes) | 147.0 ± 31.6 | 136.0 ± 41.0 | 0.20 |
Fluid intake, 0–24 hours, mLb | 5,500 ± 1,900 | 5,150 ± 1,250 | 0.44 |
Urine output, 0–24 hours, mL | 3,350 ± 1,050 | 3,990 ± 1,500 | 0.034 |
Furosemide dose, 0–24 hours, mg | 133.9 ± 168.7 | 30.9 ± 34.8 | <0.001 |
Outcomes | |||
Need for renal replacement therapy or died during hospital stay, number (percentage) | 4 (20.0) | 1 (1.3) | 0.005 |
Ventilation, days | 2.4 ± 3.1 | 0.9 ± 0.8 | 0.010 |
Length of stay in the intensive care unit, days | 6.3 ± 7.1 | 2.3 ± 2.1 | 0.012 |
Length of stay in hospital, days | 16.2 ± 13.8 | 9.5 ± 4.7 | 0.026 |