CRP and alkaline phosphatase measurement: Receiver Operating Characteristic analyses showed poor predictive accuracy of CRP on admission for mortality and severe AP, AUC: 0.669 (CI: 0.569–0.770) (Figure 1B) and AUC: 0.681 (CI: 0.601–0.761) (Figure 1C) respectively, and it failed to predict mild AP, AUC: 0.596 (CI: 0.559–0.663) (Figure 1D).