Perioperative mortality at Tibebe Ghion Specialized Teaching Hospital, Ethiopia: A longitudinal study design

•Perioperative mortality rate is the basic indicator of anesthesia and surgery safety in a country of health policy.•There were a higher mortality rate recorded after surgery and anesthesia.•There were a significant major differences of postoperative mortality rate between each surgical procedures.•Urology and general surgeries were the leading magnitude of postoperative mortality.•There was differences of survival at 24 h and 48 h of postsurgery.