Although the tests showed a statistically significant difference between the values of lipase, amylase, total bilirubin, GOP, GPT, GGT, and ALP (Table 2) when comparing the biliary and nonbiliary AP groups, a predominance of the biliary AP group in all data, when the ROC analysis, a more robust tool in the validation of diagnostic tests, was performed, it did not corroborate most of them as positive predictors for AP of biliary origin. Here, GPT is linked to alkaline phosphatase measurement.