Table 6.
Comparison of the two groups in the external test set
| Parameters | Good prognosis Group (n=64) | Poor prognosis Group (n=37) | t/χ2 | P |
|---|---|---|---|---|
| Age (years) | 60.73±5.25 | 61.02±5.57 | 0.259 | 0.797 |
| BMI (kg/m2) | 24.31±3.46 | 24.42±3.36 | 0.149 | 0.882 |
| Gender [n (%)] | 0.105 | 0.746 | ||
| Male | 35 (54.69%) | 19 (51.35%) | ||
| Female | 29 (45.31%) | 18 (48.65%) | ||
| PBW (kg) | 63.52±5.25 | 63.55±4.32 | 0.029 | 0.977 |
| Hypertension [n (%)] | 31 (48.44%) | 17 (45.95%) | 0.058 | 0.809 |
| Diabetes [n (%)] | 36 (56.25%) | 21 (56.76%) | 0.002 | 0.961 |
| Residence [n (%)] | 0.026 | 0.871 | ||
| Urban | 27 (42.19%) | 15 (40.54%) | ||
| Rural | 37 (57.81%) | 22 (59.46%) | ||
| Smoking [n (%)] | 41 (64.06%) | 22 (59.46%) | 0.212 | 0.645 |
| Drinking [n (%)] | 42 (65.62%) | 20 (54.05%) | 1.324 | 0.250 |
| ARDS severity [n (%)] | 37.685 | <0.001 | ||
| Mild | 17 (26.56%) | 0 (0.00%) | ||
| Moderate | 39 (60.94%) | 11 (29.73%) | ||
| Severe | 8 (12.50%) | 26 (70.27%) | ||
| SOFA score | 6.52±1.42 | 6.57±1.31 | 0.191 | 0.849 |
| SAPS II (score) | 45.47±5.42 | 45.34±5.57 | 0.119 | 0.906 |
| Causes of ARDS [n (%)] | 2.408 | 0.492 | ||
| Sepsis | 18 (28.12%) | 13 (35.14%) | ||
| Respiratory disease | 37 (57.81%) | 22 (59.46%) | ||
| Trauma | 2 (3.12%) | 1 (2.70%) | ||
| Others | 7 (10.94%) | 1 (2.70%) | ||
| Length of ICU stay (days) | 11.75±2.42 | 12.76±2.41 | 2.015 | 0.047 |
| Length of hospitalization (days) | 19.63±2.16 | 20.04±2.52 | 0.869 | 0.387 |
| Temperature (°C) | 36.52±1.33 | 36.43±1.52 | 0.304 | 0.762 |
| Duration of IMV (days) | 6.53±1.14 | 6.66±1.52 | 0.438 | 0.663 |
| FRC (mL/kg PBW) | 25.52±6.45 | 22.63±5.25 | 2.317 | 0.023 |
| EP (J/min) | 17.63±2.52 | 20.64±5.73 | 3.026 | 0.004 |
Note: BMI: Body Mass Index; PBW: Predicted Body Weight; ARDS: Acute Respiratory Distress Syndrome; SOFA: Sequential Organ Failure Assessment; SAPS II: Simplified Acute Physiology Score II; ICU: Intensive Care Unit; IMV: Invasive Mechanical Ventilation; FRC: Functional Residual Capacity; EP: Elastic Power.