Table 2.
Characteristics of Patients with COPD Used for Functional Studies (n = 25)
| Characteristics | Value | Range |
|---|---|---|
| Age | 69.6 | 51–83 |
| Sex | ||
| Male | 25 | |
| Female | 0 | |
| Race | ||
| White | 24 | |
| African American | 1 | |
| Pack-years of smoking, mean | 41.9 | 25–58 |
| Smoking status | ||
| Current smokers | 11 | |
| Ex-smokers | 14 | |
| FEV1, L, mean | 1.78 | 0.7–4.07 |
| FVC, L, mean | 3.22 | 1.76–5.14 |
| FEV1%, mean | 54.27 | 39.77–83.06 |
| FEV1% predicted, mean | 49.7 | 20–95 |
| GOLD severity of airflow obstruction | ||
| GOLD 1 (mild) | 1 | |
| GOLD 2 (moderate) | 13 | |
| GOLD 3 (severe) | 8 | |
| GOLD 4 (very severe) | 3 |
Definition of abbreviations: COPD = chronic obstructive pulmonary disease; GOLD = Global Initiative for Chronic Obstructive Lung Disease.