Table 2.
COPD assessment test and baseline characteristics of the study population
| Parameter | CAT II | CAT III | CAT IV | p value |
|---|---|---|---|---|
| n | 17 | 41 | 24 | |
| Female/male | 1/16 | 15/26 | 11/13 | 0.02 |
| Smoking, packs per year | 30 (20–35) | 40 (25–40) | 35 (30–0) | 0.03 |
| FEV1, % predicted | 58 (49–78) | 50 (39–60) | 30 (27–36) | 0.00 |
| FVC, % predicted | 84 (72–105) | 68 (58–78) | 49 (42–62) | 0.00 |
| FEV1/FVC, % | 62 (50–67) | 54 (49–62) | 46.50 (41–55.50) | 0.00 |
| SpO2, % | 94 (94–95) | 92 (90–94) | 88.50 (78.50–92) | 0.00 |
| IL-6, pg/mL | 4.43 (1.50–5.01) | 4.54 (1.59–8.64) | 7.575 (5–11.16) | 0.02 |
| Pro-BNP, pg/mL | 51.57 (35.58–118.20) | 68.49 (32.45–122.40) | 120.55 (92.89–144.20) | 0.00 |
Data are depicted as the median (25th to 75th percentiles), unless otherwise specified. CAT, COPD assessment test; FEV1, forced expiratory volume in 1 s; FVC, forced volume capacity; SpO2, O2 saturation; IL-6, interleukin-6; pro-BNP, pro-brain natriuretic peptide.