Table 1. Baseline Characteristics of 226 Patients with COPD.
| Variables | Mean ± SD |
|---|---|
| Age (years) | |
| All patients | 65.0 ± 7.4 (44–82) |
| Male patients | 65.0 ± 7.4 (44–82) |
| Female patients | 63.9 ± 7.2 (49–73) |
| Male:female | 212:14 |
| BMI (kg/m2) | 23.7 ± 3.2 (14.0–33.7) |
| Smoking history (PY) | 45.0 ± 29.1 (0.8–177) |
| GOLD stage (n) | |
| I | 25 |
| II | 121 |
| III | 66 |
| IV | 14 |
Unless otherwise noted, data are means ± SD, with ranges in parentheses. BMI = body mass index, COPD = chronic obstructive pulmonary disease, GOLD = Global initiative for chronic Obstructive Lung Disease, PY = pack-years, SD = standard deviation