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Table 1 Baseline characteristics of patients who underwent cardiac surgery

From: Evaluation of five different renal recovery definitions for estimation of long-term outcomes of cardiac surgery associated acute kidney injury

 All
N = 3869
Non-AKI
N = 2401
AKI
N = 1468
Age (years)54.00 ± 14.0053.00 ± 14.0057.00 ± 12.00**
Male (n, %)2271 (58.70%)1279 (53.27%)992 (67.57%)**
BMI (kg/m2)23.00 ± 3.5022.80 ± 3.4023.40 ± 3.70**
Hypertension (n, %)1135 (29.34%)649 (27.03%)486 (33.11%)**
Diabetes (n, %)365 (9.43%)212 (8.83%)153 (10.42%)
Preoperative angiography (n, %)1568 (40.53%)926 (38.57%)642 (43.73%)**
NYHA III-IV (n, %)2289 (59.16%)1352 (56.31%)937 (63.83%)**
Preoperative BUN (mmol/L)6.20 ± 1.906.00 ± 1.806.60 ± 2.00**
Preoperative SCr (μmol/L)74.50 ± 15.5073.20 ± 14.8076.60 ± 16.30**
Preoperative uric acid (μmol/L)356.60 ± 104.60343.40 ± 98.20378.20 ± 111.00**
Preoperative eGFR (mL/min/1.73 m2)94.50 ± 22.2095.10 ± 21.1093.50 ± 23.80*
eGFR ≥90 mL/min/1.73 m2 (n, %)2023 (52.29%)1303 (54.27%)720 (49.05%)**
Preoperative proteinuria (n, %)248 (6.41%)130 (5.41%)118 (8.04%)**
Type of surgery:
  Valve (n, %)2238 (57.84%)1353 (56.35%)885 (60.29%)*
  CABG (n, %)734 (18.97%)499 (20.78%)235 (16.01%)**
  Aneurysm (n, %)199 (5.14%)85 (3.54%)114 (7.77%)**
  Valve + CABG (n, %)156 (4.03%)67 (2.79%)89 (6.06%)**
Cardiopulmonary bypass duration (min)99.00 ± 40.5091.00 ± 34.00114.00 ± 45.00**
Aortic cross clamping duration (min)59.20 ± 26.9055.00 ± 24.0065.00 ± 29.00**
  1. * P <  0.05 compared with non-AKI group; ** P <  0.001 compared with non-AKI group
  2. AKI: Acute kidney injury; BMI: Body mass index; BUN: Blood urea nitrogen; CABG: Coronary artery bypass grafting; eGFR: Estimated glomerular filtration rate; NYHA: New York heart association; SCr: Serum creatinine