Table 4.
Correlation between the serum concentration of IL-18 and the lung function parameters in patients with COPD, asthma-COPD overlap, and bronchial asthma.
| Spirometric indicators | COPD | ACO | BA | |||
|---|---|---|---|---|---|---|
| r | p | r | p | r | p | |
| FVC (l) | -0.01 | 0.9 | -0.473 | 0.008 | 0.04 | 0.9 |
| FVC (%) | 0.1 | 0.45 | -0.478 | 0.008 | 0.05 | 0.85 |
| FEV1 (l) | 0.107 | 0.5 | -0,19 | 0,314 | 0.07 | 0.81 |
| FEV1 (%) | 0.131 | 0.41 | -0.38 | 0.038 | -0.03 | 0.9 |
| FEV1/FVC (%) | -0.055 | 0.72 | 0.144 | 0.44 | 0.2 | 0.4 |
| FEF25 (l) | 0.104 | 0.51 | -.0174 | 0.35 | 0.09 | 0,7 |
| FEF25 (%) | 0.118 | 0.45 | -0.107 | 0.57 | 0.09 | 0.7 |
| FEF50 (l) | 0.014 | 0.92 | -0.121 | 0.52 | 0.25 | 0.4 |
| FEF50 (%) | 0.094 | 0.55 | 0.005 | 0.98 | 0.29 | 0.3 |
| FEF75 (l) | 0.052 | 0.74 | -0.012 | 0.95 | 0.19 | 0.5 |
| FEF75 (%) | 0.058 | 0.71 | -0.204 | 0.28 | 0.08 | 0.78 |
| IC (%) | 0.129 | 0.41 | -0.126 | 0.51 | 0.2 | 0.4 |
r: correlation coefficient; COPD: chronic obstructive pulmonary disease; ACO: asthma-COPD overlap; BA: bronchial asthma.