Figure 1.

Concentration of eHsp70 in plasma of COPD patients regarding forced expiratory volume in one second (FEV₁)-based classification by Global Initiative for COPD (GOLD) (A) and ABCD classification based on symptoms severity and history of exacerbations (B). All data were presented as median with interquartile range. Statistical analysis was performed by Kruskal-Wallis one way analysis of variance on ranks. ^a statistically significant increase in eHsp70 concentration in comparison to controls; ^b statistically significant increase in eHsp70 concentration in comparison to GOLD 2 (A) or GOLD A (B); ^c statistically significant increase in eHsp70 concentration in comparison to GOLD 3 (A) or GOLD B (B).