Table 2. Preoperative laboratory variables. Data are expressed in mean±SD.
| HRnormal (n=168) | HRreduced (n=31) | P value | |
|---|---|---|---|
| Age (years) | 64.0±8.5 | 65.5±9.6 | 0.361 |
| Hematocrit (%) | 38±5 | 35±5 | 0.001 |
| Protein (g/L) | 7.0±0.7 | 6.5±0.8 | 0.005 |
| Albumin (g/dL) | 4.3±0.5 | 4.0±0.4 | 0.001 |
| WBC count (/μL) | 7325±2006 | 7825±2570 | 0.312 |
| Neutrophil (%) | 58.4±9.4 | 63.0±12.2 | 0.017 |
| Platelet count (×103/μL) | 239±68 | 275±88 | 0.011 |
| CRP (mg/dL) | 6.27±11.7 | 13.6±26.7 | 0.014 |
| Fibrinogen (mg/dL) | 361±92 | 432±124 | 0.001 |
| Prothrombin time (s) | 11.0±2.6 | 11.0±1.3 | 0.880 |
| Partial thromboplastin time (s) | 39.0±16.3 | 32.2±9.3 | 0.003 |
| CK-MB (ng/mL) | 3.5±2.5 | 4.2±3.9 | 0.390 |
| Troponin T (ng/mL) | 0.19±1.35 | 0.71±2.24 | 0.256 |
| AT-III (%) | 94.3±15.5 | 101.7±16.0 | 0.073 |
| Baseline ACT (s) | 142±16 | 148±19 | 0.101 |
HRnormal, normal heparin responsiveness; HRreduced, reduced heparin responsiveness; WBC, white blood cell; CRP, C-reactive protein; CK-MB, creatine kinase-MB; AT-III, antithrombin-III; ACT, activated clotting time.