From: Proteolytic biomarkers are related to prognosis in COPD- report from a population-based cohort
Biomarkers | non–COPD | P | COPD | P | ||
---|---|---|---|---|---|---|
Participating n = 860 | Deceased n = 88 | Participating n = 513 | Deceased n = 81 | |||
 | Median (IQR) | Median (IQR) |  | Median (IQR) | Median (IQR) |  |
MMP-9 (ng/ml) | 501 (346–605) | 535 (428–628) | 0.026 | 514 (210–641) | 607 (493–681) | < 0.001 |
TIMP-1 (ng/ml) | 311 (224–521) | 327 (250–381) | 0.670 | 300 (222–479) | 311 (260–366) | 0.839 |
MMP-9/TIMP-1 ratio | 1.34 (0.81–2.09) | 1.71 (1.19–2.16) | 0.001 | 1.38 (0.76–2.29) | 1.86 (1.52–2.34) | < 0.001 |