Fig. 2
From: Soluble RAGE in COPD, with or without coexisting obstructive sleep apnoea
Soluble receptor for advanced glycation end-products (sRAGE) values. Median and corresponding interquartile range for each group. Reduction (in percentage) in the sRAGE levels versus the healthy nonsmoker group with the corresponding adjusted p values. HNS healthy nonsmokers, HS healthy smokers, OSA obstructive sleep apnoea, COPD chronic obstructive pulmonary disease