Table 1.
Patient Characteristics According to in-Hospital Mortality
| Characteristic | Non-Survivors (29) | Survivors (400) | P-value |
|---|---|---|---|
| Hospital stay (days) | 9.79 | 8.61 | 0.232 |
| Age (yr.) | 80.14±6.56 | 75.93±9.45 | 0.019 |
| Male sex (%) | 68.97 | 66.25 | 0.765 |
| Body-mass index | 19.49±3.57 | 22.19±4.76 | 0.003 |
| Smoking status (%) | 0.119 | ||
| Never | 41.38 | 25.25 | |
| Former | 48.28 | 54.25 | |
| Current | 10.34 | 20.50 | |
| Smoking history (pack-yr.) | 46.65±29.98 | 46.43±31.16 | 0.977 |
| COPD stage (%) | <0.001 | ||
| I | - | 9.75 | |
| II | 65.52 | 36.00 | |
| III | 34.48 | 37.5 | |
| IV | - | 16.75 | |
| Congestive heart failure (%) | 65.52 | 33.75 | <0.001 |
| Renal dysfunction (%) | 68.97 | 68.50 | 0.958 |
| Exacerbations during preceding year (%) | 55.17 | 46.25 | 0.352 |
| NT-proBNP (ng/L) | 5767.00 (1372.50–12,887.00) | 236.25 (80.03–1074.75) | <0.001 |
| Neutrophil count (×109/L) | 10.52±5.82 | 7.70±4.31 | 0.016 |
| Hemoglobin (g/L) | 122.34±25.36 | 130.57±19.63 | 0.034 |
| D-dimer (μg/L) | 1231.62±1921.29 | 490.11±830.19 | 0.048 |
| pH | 7.40±0.09 | 7.39±0.05 | 0.547 |
| PaO2(mmHg) | 80.29±30.41 | 88.50±27.23 | 0.121 |
| PaCO2(mmHg) | 48.48±22.94 | 45.27±11.93 | 0.197 |
| Creatinine (μmmol/L) | 109.83±73.53 | 93.83±50.90 | 0.115 |
| BUN (mmol/L) | 9.91±6.33 | 6.51±4.01 | <0.001 |
Notes: Plus–minus values are means ±standard deviation. NT-proBNP concentrations are presented as medians (interquartile range, IQR).
Abbreviations: COPD, Chronic obstructive pulmonary disease; BUN, blood urea nitrogen; PaO2, partial pressure of O2; PaCO2, partial pressure of CO2.