Fig. 2From: The matrikine acetyl-proline-glycine-proline and clinical features of COPD: findings from SPIROMICSKaplan-Meier curve for severe AECOPD. COPD subjects with elevated sputum AcPGP had shorter time-to-first severe AECOPD compared to individuals with non-elevated sputum AcPGP (195 days [95%CI 139–252] versus 305 days [259–351], P = 0.030)Back to article page