Table 1.
Clinical characteristics of COPD exacerbation during emergency room visit (n=62)
| Characteristics | Mean ± SD or n (%) |
|---|---|
| Mean age (years) | 79.16±5.0 |
| Male gender | 55 (88.7%) |
| Post-bronchodilator FEV1 (% predicted) | 37.01±12.5 |
| White blood cell count at ER (cells/mm3) | 12,675±5,732 |
| PaCO2 at ER (mmHg) | 43.3±13.7 |
| Number of underlying medical diseases | 2.8 (range 0–8) |
| Patients with ICS/LABA or ICS treatment | 52 (83.8%) |
| Patients with influenza vaccination in the past year | 2 (3.2%) |
Abbreviations: SD, standard deviation; FEV1, forced expiratory volume in 1 second; ER, emergency room; PaCO2, partial pressure of arterial carbon dioxide; ICS, inhaled corticosteroid; LABA, long acting β2 agonist.