Inclusion Criteria:  • All Acute Appendicitis (AA) cases seen by the Surgical Department of TTM Hospital over the 24-month period between 1 January 2015 and 31 December 2016.  Exclusion Criteria:  Final diagnosis was not Acute Appendicitis (i.e., ectopic pregnancy, tubal ovarian abscess, other gynaecological pathologies, diverticulitis, Merkel diverticulitis, perforated ulcer) Final diagnosis was appendiceal abscess and/or appendiceal mass. Clinical records with missing data