Diagram of included studies evaluating patients with MSAP and SAP after reclassification. *Only studies reporting data of MSAP or SAP according to RAC 2012 are included in this manuscript. †Findings relating to AP or mixed AP/SAP studies are not summarised in this manuscript. Diagram of included studies evaluating patients with MSAP and SAP after reclassification. *Only studies reporting data of MSAP or SAP according to RAC 2012 are included in this manuscript. †Findings relating to AP or mixed AP/SAP studies are not summarised in this manuscript. AP, acute pancreatitis; MSAP, moderately severe acute pancreatitis; RAC, revised Atlanta classification; SAP, severe acute pancreatitis. Grammati Sarri et al. BMJ Open Gastroenterol 2019;6:e000248 © Author(s) (or their employer(s)) 2019. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.