Fig 1. Receiver operating characteristic curves of ScvO2 and serum lactate for predicting 28-day mortality.
ScvO2 (H0) and lactate (H0), initial ScvO2 and serum lactate at the time of presentation with severe sepsis or septic shock, respectively; ScvO2 (H6) and lactate (H6), ScvO2 and serum lactate 6 hours after presentation, respectively; Relative ScvO2 change, [(ScvO2(H0)–ScvO2(H6))/ ScvO2(H0)] x 100 (%); relative lactate change, [(lactate(H0)–lactate(H6))/ lactate(H0)] x 100 (%).