Table 1 Baseline characteristics of included patients
Variablesa | All patients (n = 416) | Normal serum total bilirubin group (n = 384) | Hyperbilirubinemia group (n = 32) | Z/t /χ2 | P value |
|---|---|---|---|---|---|
Age ≥ 75 years | 52(12.5) | 49(12.8) | 3(9.4) | 0.310 | 0.783 |
Male | 314(75.48) | 284(73.96) | 30(93.75) | 6.252 | 0.012c |
BMI, kg/m2 | 25.45 ± 3.21 | 25.45 ± 3.22 | 25.49 ± 3.04 | 0.073 | 0.942 |
Smoking history | 217(52.16) | 200(52.08) | 17(53.13) | 0.013 | 0.910 |
Comorbidities | Â | Â | Â | Â | Â |
Diabetes | 186(44.71) | 175(45.57) | 11(34.28) | 1.498 | 0.221 |
Hypertension | 289(69.47) | 268(69.79) | 21(65.63) | 0.242 | 0.623 |
Hyperlipidemia | 235(56.49) | 215(55.99) | 20(62.5) | 0.509 | 0.475 |
CKD | 4(0.96) | 4(1.04) | 0(0.00) | 0.337 | 1.000 |
COPD | 8(1.92) | 7(1.82) | 1(3.13) | 0.266 | 0.476 |
Peripheral vascular disease | 32(7.69) | 30(7.81) | 2(6.25) | 0.102 | 1.000 |
Cerebrovascular disease | 92(22.12) | 82(21.35) | 10(31.25) | 1.679 | 0.195 |
Anemia | 147(35.34) | 139(36.20) | 8(25.00) | 1.621 | 0.203 |
NYHA III–IV | 74(17.79) | 66(17.19) | 8(25.00) | 1.233 | 0.267 |
Myocardial infarction occurring > 21 days before operation | 191(45.91) | 178(46.35) | 13(40.63) | 0.390 | 0.532 |
Left ventricular ejection fraction, % | 60.71 ± 11.01 | 60.77 ± 10.93 | 60.03 ± 12.07 | 0.364 | 0.716 |
Left ventricular end diastolic diameter, cm | 49.48 ± 5.81 | 49.42 ± 5.74 | 50.23 ± 6.70 | 0.762 | 0.446 |
Left atrial diameter, cm | 37.44 ± 4.55 | 37.41 ± 4.55 | 37.78 ± 4.63 | 0.439 | 0.661 |
Pulmonary artery hypertension | 8(1.92) | 6(1.56) | 2(6.25) | 3.441 | 0.120 |
Absolute value of red blood cell, × 1012/L | 4.31 ± 0.54 | 4.30 ± 0.54 | 4.45 ± 0.50 | 1.542 | 0.124 |
Albumin, g/L | 39.72 ± 3.41 | 39.71 ± 3.38 | 39.87 ± 3.78 | 0.036 | 0.971 |
Serum creatinine, μmol/Lb | 73.70 (63.10, 87.25) | 73.55 (62.60, 87.08) | 76.75 (66.75, 88.30) | 1.096 | 0.273 |
AST, U/Lb | 22.00 (17.00, 31.00) | 22.00 (17.00, 30.00) | 21.00 (17.25, 36.00) | 0.036 | 0.971 |
ALT, U/Lb | 22.00 (16.00, 37.75) | 22.00 (16.00, 30.00) | 21.00 (14.25, 44.00) | 0.361 | 0.718 |
ALP, U/Lb | 69.00 (57.00, 80.00) | 68.50 (57.00, 79.00) | 74.50 (56.25, 86.25) | 1.342 | 0.180 |
GGT, U/Lb | 26.00 (18.00, 43.00) | 26.00 (18.00, 41.00) | 27.00 (19.25, 59.75) | 1.513 | 0.130 |
Serum total bilirubin, μmol/L | 12.41 ± 5.10 | 11.92 ± 4.52 | 18.28 ± 7.57 | 5.155 |  < 0.001c |
Operation time, hours | 3.89 ± 0.71 | 3.87 ± 0.71 | 4.01 ± 0.76 | 0.581 | 0.561 |
Intraoperative blood loss, ml | 465.79 ± 176.90 | 463.33 ± 174.40 | 495.31 ± 205.32 | 0.522 | 0.601 |
Perioperative blood transfusion [14] | 162(38.94) | 144(37.50) | 18(56.25) | 4.367 | 0.037c |
Perioperative IABP implantation | 101(24.28) | 87(22.66) | 14(43.75) | 7.149 | 0.008c |
Target vesselsb | 3.00(2.00, 3.00) | 3.00(2.00, 3.00) | 3.00(2.00, 3.00) | 0.343 | 0.732 |