Skip to main content

Table 1 Basic characteristics of the patients according to the differences between adjusted and unadjusted postoperative serum creatinine

From: Hemodilution is associated with underestimation of serum creatinine in cardiac surgery patients: a retrospective analysis

  Underestimation
n = 353
Normal
n = 641
Overestimation
n = 340
P value
Demographic data
 Male [n (%)] 228 (64.6) 338 (52.7) 210 (61.8) 0.687
 Age (years) 61 ± 11 56 ± 12 52 ± 13 < 0.001
 BMI (kg/m2) 23.2 ± 3.0 23.3 ± 3.3 22.9 ± 3.4 0.314
Comorbid conditions [n (%)]
 Hypertension 163 (46.2) 218 (34.0) 97 (28.5) < 0.001
 DM 73 (20.7) 66 (10.3) 20 (5.9) < 0.001
 CKD 6 (1.7) 4 (0.6) 4 (1.2) 0.272
 Cancer 3 (0.8) 10 (1.6) 7 (2.1) 0.418
 ACS 8 (2.3) 13 (2.0) 1 (0.3) 0.073
 Stroke 8 (2.3) 19 (3.0) 6 (1.8) 0.494
 Atrial fibrillation 12 (3.4) 25 (3.9) 13 (3.8) 0.921
Contrast exposure [n (%)] 210 (59.5) 356 (55.5) 168 (49.4) 0.027
NYHA III-IV [n (%)] 211 (59.8) 470 (73.3) 266 (78.2) < 0.001
LVEF (%) 59.7 ± 9.6 61.9 ± 8.6 60.6 ± 9.3 0.006
Preoperative SCr (μmol/L) 87.4 ± 31.8 76.7 ± 17.1 81.9 ± 24.1 < 0.001
APACHE II at ICU admission 13.1 ± 3.4 12.0 ± 3.5 12.7 ± 3.9 < 0.001
Type of surgery [n (%)]
 Off-pump 154 (43.6) 119 (18.6) 5 (1.8) < 0.001
  CABG 154 (43.6) 119 (18.6) 5 (1.8) < 0.001
 On-pump 199 (56.4) 522 (81.4) 335 (98.5) < 0.001
  Valvular surgery 174 (49.3) 424 (66.1) 274 (80.6) < 0.001
  CABG + valvular surgery 25 (7.1) 98 (15.3) 61 (17.9) < 0.001
 On pump-surgery variables
  CPB time (min) 105.3 ± 45.2 91.2 ± 32.3 104.4 ± 72.2 < 0.001
  Cross-clamp (min) 63.9 ± 28.6 56.1 ± 30.6 60.1 ± 26.8 0.006
  Ultrafiltration (ml) 1311 ± 1417 1727 ± 1036 1891 ± 1268 < 0.001
  1. The data in the table are expressed as mean ± standard deviation or number (%). P value is for the comparison among groups