GPT and alkaline phosphatase measurement: Comparison of laboratory parameters (serum amylase and lipase levels, urine amylase levels, aspartate transaminase, alanine aminotransferase, gamma-glutamyl transferase, alkaline phosphatase, and bilirubin) and assessment of AP severity based on the APACHE II scoring system, conducted on both day 1 and then days 4-6, did not reveal statistically significant differences between the groups of patients with and without progression on a follow-up CT.