Table 2.
Characteristics of the Survival and Death Patients in the Training Set
| Variables | Survival (N=325) |
Death (N=34) |
t or χ2 | P |
|---|---|---|---|---|
| Sex (males/females) | 193/132 | 19/15 | 0.156 | 0.693 |
| Age (years) | 71.5±11.5 | 76.7±10.9 | 2.497 | 0.013 |
| Age<64yrs | 89(27.4) | 4(11.8) | 7.433 | 0.024 |
| Age 65~84yrs | 196(60.3) | 21(61.8) | ||
| Age ≥85yrs | 40(12.3) | 9(26.5) | ||
| Ethnicity [n(%)] | ||||
| Han | 310(95.4) | 32(94.1) | 0.954 | 0.621 |
| Other | 11(3.4) | 2(5.9) | ||
| Unknown | 4(1.2) | 0(0.0) | ||
| Confusion [n(%)] | 36(11.1) | 7(20.6) | 1.816 | 0.178 |
| Temperature (°C) | 36.9±0.8 | 36.9±1.0 | 0.312 | 0.755 |
| Temperature <35°C or ≥40°C [n(%)] | 0(0.0) | 0(0.0) | ||
| Respiratory rate (/min) | 21.0±3.6 | 22.7±5.7 | 1.667 | 0.104 |
| Respiratory rate ≥30/min [n(%)] | 14(4.3) | 5(14.7) | 4.727 | 0.030 |
| Pulse (/min) | 89.2±17.1 | 105.4±24.8 | 3.711 | 0.001 |
| Pulse≥125/min [n(%)] | 12(3.7) | 6(17.6) | 9.826 | 0.002 |
| SBP (mmHg) | 135.2±23.6 | 132.1±30.0 | 0.579 | 0.566 |
| DBP (mmHg) | 77.0±12.6 | 76.6±13.4 | 0.193 | 0.847 |
| SBP <90mmHg [n(%)] | 6(1.8) | 2(5.9) | 0.170* | |
| Low BP(SBP<90 or DBP≤60mmHg) [n(%)] | 35(10.8) | 4(11.8) | 0.000 | 1.000 |
| Urea (mmol/L) | 7.87±5.51 | 11.32±7.37 | 3.350 | 0.001 |
| Urea≥11mmol/L [n(%)] | 53(16.3) | 16(47.1) | 18.747 | <0.001 |
| Sodium (mmol/L) | 137.4±6.6 | 134.4±7.9 | 2.508 | 0.013 |
| Sodium<130mmol/L [n(%)] | 31(9.5) | 6(17.6) | 1.400 | 0.237 |
| Glucose (mmol/L) | 10.78±5.06 | 12.14±6.66 | 1.443 | 0.150 |
| Glucose≥14mmol/L [n(%)] | 61(18.8) | 8(23.5) | 0.449 | 0.503 |
| Hematocrit (%) | 36.4±6.8 | 34.0±5.9 | 1.945 | 0.053 |
| Hematocrit<30% [n(%)] | 56(17.2) | 6(17.6) | 0.004 | 0.951 |
| Albumin (g/L) | 34.8±5.0 | 31.7±4.7 | 3.465 | 0.001 |
| Albumin <25g/L | 165(50.8) | 5(14.7) | 20.840 | <0.001 |
| Albumin 25~34.9 g/L | 155(47.7) | 26(76.5) | ||
| Albumin≥35 g/L | 5(1.5) | 3(8.8) |
Note: *Fisher’s exact test.
Abbreviations: SBP, systolic blood pressure; DBP, diastolic blood pressure.