Table 1.
Baseline characteristics of participants (N = 30)
| Mean ± SD or n (%) | |
|---|---|
| Demographics | |
| Age, yr | 71.1 ± 8.4 |
| Height, cm | 165.1 ± 10.2 |
| Weight, kg | 85.3 ± 17.7 |
| Sex | |
| Male | 14 (46.7) |
| Female | 16 (53.3) |
| Race | |
| White, non-Hispanic | 24 (80.0) |
| Black or African American, non-Hispanic | 6 (20.0) |
| Income | |
| <$25,000 | 10 (33.3) |
| $25,000–$49,999 | 10 (33.3) |
| ⩾$50,000 | 9 (30.0) |
| Other or missing | 1 (3.3) |
| Education | |
| Up to grade 12 or GED | 8 (26.7) |
| Some college—associate’s degree | 13 (43.3) |
| Bachelor’s degree and above | 9 (30.0) |
| Total pack-year smoking history | 54.4 ± 30.7 |
| Home fuel use | |
| Heating | |
| Gas | 13 (43.3) |
| Electric | 5 (16.7) |
| Oil | 10 (33.3) |
| Other or unknown | 2 (6.7) |
| Cooking | |
| Gas | 12 (40.0) |
| Electric | 18 (60.0) |
| Baseline clinical measures | |
| FEV1, L | 1.3 ± 0.5 |
| FEV1 % predicted | 54.3 ± 14.5 |
| FVC, L | 2.5 ± 0.9 |
| FVC % predicted | 79.9 ± 15.8 |
| FEV1/FVC | 51.1 ± 11.5 |
| Eosinophil count | |
| ⩾150 cells/μl | 16 (55.2) |
| <150 cells/μl | 13 (44.8) |
| Baseline medication use | |
| Inhaled corticosteroid | |
| Yes | 18 (60.0) |
| No | 12 (40.0) |
| Long-acting bronchodilator | |
| Yes | 23 (76.7) |
| No | 7 (23.3) |
| Short-acting bronchodilator | |
| Yes | 23 (76.7) |
| No | 7 (23.3) |
Definition of abbreviations: FEV1 = forced expiratory volume in 1 second; FVC = forced vital capacity; GED = General Educational Diploma; SD = standard deviation.