How severe is moderately severe acute pancreatitis? Clinical validation of revised 2012 Atlanta Classification

Figure 1 Distribution of patient allocation between the Atlanta 1992 and Atlanta 2012 subgroups. Majority (20) of moderately severe (APACHE II score range: 6-9) AP cases according to Atlanta 2012 classification matched to being severe according to Atlanta 1992 classification, as only 7 patients would have been classified as “mild”. Both mild (APACHE II score range: 0-6) and severe (APACHE II score range: 9-27) AP patients according to Atlanta 2012 classification matched the groups identically to Atlanta 1992 classification. AP: Acute pancreatitis.