Univariate analyses of variables associated with poor outcomes
| Variables | Favourable outcomes (n=249) | Poor outcomes (n=182) | t/χ2 | P value |
| Age, years | 56.12±11.47 | 59.86±12.65 | −3.113 | 0.002 |
| BMI, kg/m2 | 24.39±4.20 | 24.85±4.66 | −1.072 | 0.284 |
| SBP, mm Hg | 128.34±41.27 | 136.52±39.74 | −2.064 | 0.039 |
| DBP, mm Hg | 75.26±20.47 | 78.64±21.33 | −1.663 | 0.097 |
| WCC, ×109 /L | 7.47±2.95 | 7.31±2.87 | 0.562 | 0.574 |
| RCC, ×1012 /L | 4.29±1.25 | 4.21±1.23 | 0.661 | 0.509 |
| PLT, ×109 /L | 153.27±49.14 | 157.51±47.65 | −0.896 | 0.370 |
| SII, ×109 /L | 335.72±174.76 | 658.40±436.29 | −10.571 | ＜0.001 |
| Hb, g/L | 132.47±21.24 | 127.55±22.14 | 2.333 | 0.020 |
| ALT, U/L | 34.24±10.34 | 35.88±11.48 | −1.552 | 0.121 |
| AST, U/L | 30.76±9.45 | 31.12±10.01 | −1.227 | 0.220 |
| ALB, g/L | 38.27±5.32 | 36.92±5.13 | 2.642 | 0.010 |
| TB, μmol/L | 15.84±4.37 | 16.22±4.51 | −0.879 | 0.379 |
| Cr, μmol/L | 78.14±22.61 | 81.64±23.29 | −1.567 | 0.117 |
| cTnT, pg/mL | 8.73±3.21 | 8.97±3.18 | −0.769 | 0.441 |
| CK-MB, ng/mL | 2.64±0.76 | 2.75±0.84 | −1.141 | 0.156 |
| NT-pro-BNP, pg/mL | 1593.28±398.87 | 1685.35±459.34 | −2.219 | 0.027 |
| LVEF, % | 60.25±10.73 | 57.76±10.38 | 2.412 | 0.016 |
| LVEDD, mm | 49.91±9.75 | 51.03±11.38 | −1.097 | 0.273 |
| NYHA class .34 | 4.440 | 0.035 | ||
| Yes | 158 (63.45%) | 133 (73.07%) | ||
| No | 91 (36.55%) | 49 (26.93%) | ||
| Gender, male | 0.019 | 0.891 | ||
| Male | 116 (46.58%) | 86 (47.25%) | ||
| Female | 133 (53.42%) | 96 (52.75%) | ||
| Smoking | 0.712 | 0.399 | ||
| Yes | 139 (55.82%) | 109 (59.89%) | ||
| No | 110 (44.18%) | 73 (40.11%) | ||
| Drinking | 1.051 | 0.305 | ||
| Yes | 108 (43.37%) | 88 (48.35%) | ||
| No | 141 (56.63%) | 94 (51.65%) | ||
| Hypertension | 0.144 | 0.706 | ||
| Yes | 63 (25.30%) | 49 (26.92%) | ||
| No | 186 (74.70%) | 133 (73.08%) | ||
| Cerebral infarction | 0.855 | 0.355 | ||
| Yes | 22 (8.83%) | 21 (11.54%) | ||
| No | 227 (91.17%) | 161 (88.46%) | ||
| Diabetes | 4.548 | 0.033 | ||
| Yes | 25 (10.04%) | 31 (17.03%) | ||
| No | 224 (89.96%) | 151 (82.97%) | ||
| COPD | 1.379 | 0.240 | ||
| Yes | 36 (14.46%) | 34 (18.68%) | ||
| No | 213 (85.54%) | 148 (81.32%) | ||
| AF | 1.436 | 0.231 | ||
| Yes | 47 (18.88%) | 50 (27.47%) | ||
| No | 202 (81.12%) | 132 (72.53%) | ||
| CPB time, min | 95.33±29.18 | 105.67±27.89 | −2.985 | 0.003 |
| ACT time, min | 69.24±24.59 | 84.39±30.65 | −5.688 | ＜0.001 |
| Use of red blood cell, mL | 388.54±103.17 | 420.15±132.38 | −2.784 | 0.005 |
ACT, aortic cross-clamping time; AF, atrial fibrillation; ALB, albumin; ALT, alanine transaminase; AST, aspartate aminotransferase; BMI, body mass index; CK-MB, creatine kinase MB; COPD, chronic obstructive pulmonary disease; CPB, cardiopulmonary bypass; Cr, creatinine; cTnT, Troponin T; DBP, diastole blood pressure; Hb, haemoglobin; LVEDD, left ventricular end-diastolic dimension; LVEF, left ventricular ejection fraction; NT-proBNP, N-terminal pro brain natriuretic peptide; NYHA, New York Heart Association; PLT, platelets; RCC, red cell count; SBP, systolic blood pressure; SII, systemic immune-inflammation index; TB, total bilirubin; WCC, white cell count.