Fig. 3From: Unique patterns of lower respiratory tract microbiota are associated with inflammation and hospital mortality in acute respiratory distress syndromea Correlation between alpha diversity (Shannon diversity index) and serum (in 22 survivors and 13 non-survivors) and BALF IL-6 (in 23 survivors and 15 non-survivors). No significant correlation was found between IL-6 and the Shannon diversity index. b Correlation between the copy numbers of 16S rRNA genes in the BALF and the serum and BALF IL-6. Increased copy numbers of 16S rRNA were correlated with increased serum IL-6. BALF, bronchoalveolar lavage fluid; IL, interleukinBack to article page