Table 1.

Quantitative analysis of serum NE and MMP-2 in COPD patients vs the controls

	Neutrophil elastase (μg/ml)	Matrix metalloprotease-2 (μg/ml)
Controls	0.047 ± 0.014	0.05 ± 0.0083
COPD patients	0.21 ± 0.018	0.71 ± 0.0647