Table 1.
Patient characteristics according to 30-day mortality
| Variable | Total patients (n=470) | Alive (n=412) | Dead (n=58) | P-value |
|---|---|---|---|---|
| Age (yr) | 71.5±15.7 | 70.9±16.0 | 75.6±12.9 | < 0.05 |
| Male sex (%) | 323 (68.7) | 283 (68.7) | 40 (69.0) | 0.97 |
| Comorbidities | ||||
| Heart failure | 13 (2.8) | 12 (2.9) | 1 (1.7) | 1.00 |
| Renal failure | 68 (14.5) | 60 (14.6) | 8 (13.8) | 0.88 |
| Liver disease | 27 (5.7) | 25 (6.1) | 2 (3.4) | 0.56 |
| COPD | 72 (15.3) | 66 (16.0) | 6 (10.3) | 0.18 |
| Neoplasm | 100 (21.3) | 84 (20.4) | 16 (27.6) | 0.21 |
| Neurologic disease | 143 (30.4) | 124 (30.1) | 19 (32.8) | 0.68 |
| Diabetes mellitus | 155 (33.0) | 139 (33.7) | 16 (27.6) | 0.35 |
| Laboratory findings | ||||
| WBC | 13.3±8.2 | 13.2±8.3 | 13.4±7.3 | 0.86 |
| Hemoglobin level | 11.7±2.1 | 11.8±2.1 | 11.4±2.0 | 0.18 |
| RDW at day 1 | 14.8±1.9 | 14.7±1.9 | 15.6±2.1 | < 0.05 |
| Hematocrit (%) | 35.2±6.1 | 35.3±6.1 | 34.5±6.3 | 0.40 |
| MCV | 93.6±6.9 | 93.5±6.7 | 93.9±8.0 | 0.71 |
| MCH | 31.2±2.6 | 31.2±2.6 | 31.0±2.9 | 0.53 |
| Platelet (×103/mm3) | 239.8±125.9 | 238.7±127.0 | 247.3±118.8 | 0.63 |
| Glucose (mg/dL) | 159.4±91.7 | 158.0±93.0 | 169.0±82.6 | 0.39 |
| Albumin (g/dL) | 3.3±0.6 | 3.4±0.6 | 3.1±0.6 | < 0.05 |
| Cholesterol (g/dL) | 137.8±40.1 | 137.0±39.4 | 143.3±45.0 | 0.26 |
| BUN (mg/dL) | 28.9±21.2 | 28.2±20.7 | 34.3±24.1 | < 0.05 |
| Total protein | 6.4±0.9 | 6.4±0.8 | 6.2±0.9 | < 0.05 |
| Creatinine (mg/dL) | 1.5±1.6 | 1.5±1.5 | 1.8±1.8 | 0.22 |
| Na | 135.9±7.0 | 136.0±6.9 | 135.1±7.5 | 0.35 |
| K | 4.2±0.7 | 4.2±0.7 | 4.3±0.9 | 0.43 |
| Cl | 100.0±7.7 | 100.2±7.7 | 99.2±7.6 | 0.38 |
| PT (INR) | 1.3±1.2 | 1.3±1.2 | 1.3±0.6 | 0.96 |
| APT (sec) | 43.7±11.8 | 43.9±12.3 | 42.7±7.3 | 0.47 |
| CRP (mg/dL) | 14.2±9.3 | 14.1±9.3 | 14.9±8.8 | 0.53 |
| PSI score | 112.5±39.1 | 109.5±38.9 | 134.0±33.6 | < 0.05 |
| PSI class | <0.05 | |||
| I, II | 61 (13.0) | 59 (14.3) | 2 (3.4) | |
| III | 73 (15.5) | 70 (17.0) | 3 (5.2) | |
| IV | 190 (40.4) | 166 (40.3) | 24 (41.4) | |
| V | 146 (31.1) | 117 (28.4) | 29 (50.0) |
Values are presented as mean±standard deviation or number (%).
COPD, chronic obstructive pulmonary disease; WBC, white blood cell; RDW, red blood cell distribution width; MCV, mean corpuscular volume; MCH, mean corpuscular hemoglobin; BUN, blood urea nitrogen; PT, prothrombin time; INR, international normalized ratio; APT, activated partial thromboplastin time; CRP, C-reactive protein; PSI, pneumonia severity index.