Abbreviations: BISAP, bedside index of severity in acute pancreatitis; BMI, body mass index; BUN, blood urea nitrogen; CI, confidence interval; CR, creatinine; CRP, c-reactive protein; HAPS, harmless acute pancreatitis score; HCT, hematocrit; HTG, hypertriglyceridemia; OR, odds ratio; PCT, procalcitonin; SIRS, systemic inflammatory response system; WBC, white blood cell. Here, CALCA is linked to acute pancreatitis.