Additional file 2 of Angiopoietin-2 outperforms other endothelial biomarkers associated with severe acute kidney injury in patients with severe sepsis and respiratory failure

Additional file 2. Plasma levels of angiopoietin-2 were modestly associated with (a) plasma levels of endocan, (b) plasma levels of syndecan-1 and (c) plasma levels of sVE-cadherin. Plasma levels of endocan were modestly associated with (d) plasma levels of syndecan-1, but not associated with (e) plasma levels of sVE-cadherin. Plasma levels of sVE-cadherin were modestly associated with (f) plasma levels of syndecan-1. Collinearity of these four endothelial biomarkers was analyzed by Spearman rank correlation test.