CRP and alkaline phosphatase measurement: As compared to CRP level, NRBC count demonstrated significant enhancement in predicting poor prognosis in AP patients (NRI = 0.522, 95%CI: 0.050–0.994, p = 0.030; IDI = 0.951, 95%CI: 0.489–1.410, p < 0.001); however, no significant enhancement was observed when compared to PCT (Table 6).