TABLE 1.
Participant characteristics.
| COPD | CON | P | |
|---|---|---|---|
| n | 19 | 19 | — |
| Age (yr) | 64 (±9) | 62 (±7) | 0.44 |
| Weight (kg) | 72 (±17) | 78 (±17) | 0.23 |
| Height (cm) | 171 (±10) | 170 (±10) | 0.76 |
| BMI (kg·m−2) | 24 (±4) | 27 (±4) | 0.06 |
| Sex (M/F) | 14/5 | 14/5 | — |
| Race (AA/NHW) | 5/14 | 11/8 | — |
| FVC (L) | 3.1 (±0.9) | 3.7 (±0.8) | 0.02 |
| FEV1 (L) | 1.6 (±0.8) | 2.8 (±0.6) | 0.0001 |
| FEV1/FVC (%) | 47.3 (±15.2) | 75.6 (±4.0) | 0.0001 |
| FEV1 %pred | 44.1 (±18.7) | 97.1 (±12.1) | 0.0001 |
| Resting SpO2 (%) | 97 (±1.6)* | 97 (±1.3) | 0.39 |
| Smoking history (ATS pack-years) | 37 (±15) | 38 (±19) | 0.41 |
| GOLD stage (2/3/4) | 7/6/6 | 0/0/0 | — |
Data are mean (±SD). Bold font indicates significance at P < 0.05.
*Four COPD patients required nasal cannula O2 during the visit (at 2 L·min−1).
AA, African American; F, female, M, male; NHW, non-Hispanic white; SpO2, arterial oxygen saturation from finger pulse oximetry.