Introduction: Hospital deaths today account for a large proportion of society deaths and is one of the hallmarks of the quality of medical services in the hospital and the effectiveness of health programs and the economic benefit of various groups of society. The aim of this study was to investigate the epidemiology of mortality in a selected military hospital between 2012 -2017. Materials and Method: This cross-sectional descriptive study was carried out using data from the medical records department of the hospital during 2012-2017. In order to complete the study, the clinical records of all patients death during the mentioned period, and the gender, season, location, type of death day, death shift, type of death, age group, cause of death, death part, Duration of hospitalization, surgery and blood intake were recorded and Data were analyzed by SPSS software version 25 and descriptive statistics and Chi-square test. Results: The total number of deaths in the target hospital during the six years was 403, of which 223 were male (55.3%), 180 were female (44.6%). Also, 42 (10.4%) patients had been admitted for 24 hours and 361 (89.5%) had died after 24 hours of hospitalization, and the patients died at night shift of 165 (59%), the evening of 125 (31%) and morning (113%) (28%) respectively. Conclusion: The high age of patients died and chronic and non-communicable diseases as the main cause of mortality indicate the need for more attention to prevention and control of these diseases. Through the screening programs, empowering people, and legislating to promote healthy lifestyles, it will help reduce the incidence of these diseases.
