Table 1. Baseline characteristics between model cohort and validation cohort.
| Parameter | Stratification | Total | Model cohort | Validation cohort | Test_value | P _Value |
|---|---|---|---|---|---|---|
| Survival_status [n(%)] | 0 | 283(22.5) | 136(10.8) | 147(11.7) | 0.44 | 0.509 |
| 1 | 972(77.5) | 491(39.1) | 481(38.3) | |||
| Gender [n(%)] | 0 | 373(29.7) | 161(12.8) | 212(16.9) | 9.42 | 0.002 |
| 1 | 882(70.3) | 466(37.1) | 416(33.2) | |||
| Pathogens [n(%)] | 0 | 1218(97.1) | 605(48.2) | 613(48.8) | 1.01 | 0.314 |
| 1 | 37(2.9) | 22(1.8) | 15(1.2) | |||
| Consciousness [n(%)] | 0 | 1180(94.0) | 581(46.3) | 599(47.7) | 8.56 | 0.073 |
| 1 | 53(4.2) | 32(2.6) | 21(1.7) | |||
| 2 | 16(1.3) | 8(0.6) | 8(0.6) | |||
| 3 | 5(4.0) | 5(0.4) | 0(0) | |||
| 4 | 1(0.1) | 1(0.1) | 0(0) | |||
| Center [n(%)] | 1 | 99(7.9) | 48(3.8) | 51(4.1) | 0.04 | 0.841 |
| Smoking_year | 30.0(0.0,40.0) | 30.0(0.0,40.0) | 30.0(0.0,45.0) | 185598 | 0.073 | |
| Smoking_index | 500.0(0.0,1000.0) | 425.0(0.0,1000.0) | 600.0(0.0,1025.0) | 183529.5 | 0.034 | |
| Age (Year) | 74.0(67.0,79.0) | 74.0(67.0,79.0) | 74.0(66.0,79.0) | 198290 | 0.826 | |
| Weight (Meter) | 51.0(45.0,55.0) | 51.0(45.0,55.0) | 51.0(45.0,56.0) | 196422.5 | 0.943 | |
| Height (Meter) | 1.62(1.58,1.65) | 1.62(1.57,1.65) | 1.62(1.58,1.65) | 190905 | 0.351 | |
| BMI | 19.2(17.7,21.1) | 19.1(17.7,21.1) | 19.2(17.7,21.0) | 198432.5 | 0.809 | |
| Temperature (°C) | 36.9(36.8,37.2) | 37.0(36.8,37.2) | 36.9(36.7,37.2) | 210293 | 0.035 | |
| HR | 100.0(90.0,112.0) | 100.0(90.0,112.0) | 100.0(90.0,110.0) | 194186.5 | 0.675 | |
| RR | 22.0(22.0,26.0) | 22.0(22.0,24.0) | 22.0(22.0,26.0) | 188351.5 | 0.173 | |
| DBP (mmHg) | 132.0(120.0,143.0) | 132.0(121.0,143.0) | 131.0(118.0,143.0) | 204455 | 0.238 | |
| SBP (mmHg) | 79.6 ± 12.3 | 79.9 ± 11.8 | 79.3 ± 12.8 | 0.894 | 0.372 | |
| WBC (109/L) | 8.6(6.4,11.9) | 8.6(6.4,11.9) | 8.5(6.3,11.9) | 196569 | 0.962 | |
| GR (%) | 75.1(65.9,83.0) | 75.1(66.1,83.0) | 75.3(65.3,83.2) | 198623.5 | 0.786 | |
| HB (g/L) | 132.0(118.0,145.0) | 131.5(116.0,144.0) | 132.0(119.0,145.0) | 191450 | 0.398 | |
| PLT (109/L) | 229.0(172.0,293.0) | 227.0(174.0,292.0) | 229.0(170.5,294.0) | 196630 | 0.969 | |
| K (mmol/L) | 4.0(3.7,4.4) | 4.0(3.7,4.4) | 4.0(3.7,4.4) | 193360 | 0.583 | |
| Na (mmol/L) | 141.0(137.0,144.0) | 141.0(137.0,145.0) | 141.0(137.0,144.0) | 202970.5 | 0.342 | |
| Ca (mmol/L) | 2.3(2.2,2.4) | 2.3(2.2,2.4) | 2.3(2.2,2.4) | 198154 | 0.842 | |
| Glu (mmol/L) | 6.4(5.4,8.3) | 6.4(5.4,8.4) | 6.4(5.4,8.1) | 200859.5 | 0.535 | |
| Bun (mmol/L) | 5.3(4.1,7.1) | 5.2(4.1,6.9) | 5.4(4.1,7.2) | 189045 | 0.222 | |
| Cr (mmol/L) | 80.8(66.3,99.6) | 80.5(65.8,98.3) | 81.0(66.7,101.0) | 192127 | 0.459 | |
| PH | 7.359(7.317,7.397) | 7.358(7.318,7.393) | 7.36(7.317,7.399) | 193648.5 | 0.615 | |
| PaCO2 (mmHg) | 47.8(41.7,59.9) | 47.7(41.3,59.2) | 47.9(41.9,60.1) | 190215 | 0.299 | |
| PO2 (mmHg) | 81.9(64.9,103.2) | 82.3(64.7,104.9) | 81.1(65.2,101.5) | 202484.5 | 0.383 | |
| Oxygen_index | 287.1(232.8,342.8) | 285.6(232.8,339.1) | 289.7(232.9,347.0) | 195917.5 | 0.881 | |
| AST (U/L) | 25.0(20.0,35.0) | 25.0(20.0,35.0) | 25.0(20.0,34.0) | 197225 | 0.957 | |
| ALT (U/L) | 15.0(10.0,25.0) | 15.0(10.8,26.0) | 15.0(10.0,25.0) | 204637.5 | 0.226 | |
| ALB (g/L) | 38.8(36.1,41.5) | 38.8(36.1,41.5) | 38.9(36.0,41.6) | 194930.5 | 0.762 | |
| GLB (g/L) | 23.7(20.5,26.7) | 23.7(20.6,26.5) | 23.7(20.5,27.0) | 194228.5 | 0.68 | |
| CRP (µg/L) | 24.4(6.6,67.0) | 25.0(6.7,71.6) | 22.4(6.4,69.0) | 201399 | 0.481 | |
| Survival_month (month) | 38.5(11.1,92.0) | 41.1(12.9,94.4) | 34.4(10.3,86.7) | 209713.5 | 0.046 | |
| BNP (ng/L) | 65.5(28.6,231.1) | 62.45(29.0,221.2) | 70.2(28.3,236.2) | 193919.5 | 0.645 |