ANGPT2 and acute respiratory distress syndrome: On the contrary, the Ang2 levels in ALI/ADRS were significantly higher than those in the non-ALI/ARDS patients during the study period and the effects were more prominent in ARDS patients (non-ARDS vs. ARDS: day 1, p < 0.001; day 3, p < 0.001; day 5, p < 0.001).