TAP: trypsinogen activation peptide
CAPAP: carboxypeptidase activation peptide
PPV: positive predictive value
NPV: negative predictive value
PLR: positive likelihood ratio: sensitivity/(100-specificity)
NLR: negative likelihood ratio: (100-sensitivity)/specificity
Pre-test probability: the index of suspicion for severe acute pancreatitis
Post-test probability: the probability of severe disease according to the result of the test [157].