Correlation between biomarkers and pulmonary function in COPD patients
| Parameters | FEV1%pred | FEV1/FVC ratio |
| FKN | r=−0.4367, p<0.001 | r=−0.3867, p<0.001 |
| MMP-12 | r=−0.3295, p<0.001 | r=−0.2941, p<0.001 |
| NE | r=−0.2684, p=0.003 | r=−0.2153, p=0.021 |
COPD, chronic obstructive pulmonary disease; FEV, forced expiratory volume; FKN, fractalkine; FVC, forced vital capacity; MMP-12, matrix metalloproteinase-12; NE, neutrophil elastase.