Table 1.
Comparison of clinical characteristics between the two groups
| Item | Death group (n=52) | Survival group (n=206) | t/χ2 | P |
|---|---|---|---|---|
| Sex (Male/Female) | 29/23 | 131/75 | 1.079 | 0.299 |
| (age) | 74.10±3.59 | 65.91±4.09 | 13.207 | < 0.001 |
| Body mass index (Kg/m2) | 21.59±2.16 | 21.49±2.10 | 0.318 | 0.750 |
| Hypertension | 15 (28.85) | 35 (16.99) | 3.735 | 0.053 |
| diabetes | 17 (15.94) | 39 (26.72) | 3.148 | 0.076 |
| Hyperlipidemia | 9 (17.31) | 26 (12.21) | 0.778 | 0.378 |
| Smoking history | 16 (30.77) | 41 (19.90) | 2.848 | 0.091 |
| Use of intra-aortic balloon pump | 19 (36.54) | 58 (28.16) | 1.394 | 0.238 |
| History of beta-blocker use | 21 (40.38) | 68 (33.01) | 0.999 | 0.317 |
| History of cardiac arrest | 9 (17.31) | 31 (15.05) | 0.162 | 0.688 |
| Invasive mechanical ventilation | 8 (15.34) | 29 (14.08) | 0.058 | 0.810 |
| Central venous pressure oxygen saturation (cmH2O) | 14.25±1.28 | 13.95±1.24 | 1.564 | 0.119 |
| Central venous pressure oxygen saturation (%) | 50.15±17.76 | 61.45±12.65 | -5.256 | < 0.001 |
| Heart rate (beats/min) | 99.67±6.41 | 101.69±7.45 | -1.792 | 0.074 |
| APACHE II score (points) | 53.52±4.34 | 44.10±3.85 | 15.258 | < 0.001 |
| Lymphocyte count (×109/L) | 1.47±0.38 | 0.90±0.11 | 18.734 | < 0.001 |
| PLT (×109/L) | 184.27±18.47 | 189.12±18.23 | -2.451 | 0.015 |
| Serum creatinine (μmol/L) | 127.34±40.18 | 105.26±33.58 | 4.067 | < 0.001 |
| Urea nitrogen (mmol/L) | 7.86±2.23 | 6.21±2.03 | 5.120 | < 0.001 |
| Troponin I (μg/L) | 33.61±11.49 | 25.39±7.95 | 6.035 | < 0.001 |
| Lactic acid (mmol/L) | 11.72±3.44 | 9.27±2.47 | 5.861 | < 0.001 |
Notes: APACHE II score: Acute Physiology and Chronic Health Evaluation score; PLT: platelet count.