Fig. 2

Comparison of the receiver operating characteristic curves of the antithrombin activities for 28-day survival. Receiver operating characteristic (ROC) curves comparing post-treatment antithrombin activity (solid line), baseline antithrombin activity (dashed line), and delta antithrombin activity (post-treatment activity minus baseline activity, dashed-dotted line) for 28-day survival are depicted. The respective areas under the ROC curves (AUCs) for these three activities were 0.639, 0.609, and 0.573, and the cutoff values were 80%, 47%, and 16.4%