Background: Polytrauma represents traumatic injuries affecting two or more body systems or organs, where at least one of the injuries is potentially life-threatening. The effects of severe trauma are associated with acute blood loss and resulting soft tissue hypoperfusion and injury that activates the immune system, particularly if open wounds are present. According to data from the World Health Organization, injuries are the leading external cause of death in 2020, namely falls (43%), suicides (21%) and traffic accidents (12%), followed by poisoning (3%) and suffocation (3 %). Triage decisions are based on the signs and symptoms presented by the patient, but not with the aim of reaching a medical diagnosis. The life of severely injured or polytraumatized patients depends on time. The golden hour starts at the moment of injury. Aim: The main goal of this research is to compare the assessment of the condition of a severely injured or polytraumatized patient using triage scales (Glasgow coma score, AVPU scale, vital signs) that are used in outpatient and in-hospital assessment upon arrival at Emergency Department. Subjects and research methods: The research will use the data of all patients who, according to the triage system, are classified as seriously injured or polytraumatized. A retrospective analysis of the databases of the Institute of Emergency Medicine of Zadar County and the Emergency Department of Zadar General Hospital will be used. After the relevant data have been collected, the obtained data will be analyzed using appropriate descriptive statistics and the Microsoft Excel software. Results: A total of 45 patients fulfilling inclusion criteria were found in the databases mentioned above, triaged and treated by the Institute of Emergency Medicine of Zadar County and the Zadar General Hospital Emergency Department. Five patients (11.1%) were excluded due to undetectable blood pressure or absent pulse, and further analysis was conducted on the remaining 40 patients. Conclusion: Based on the obtained results, it is evident that according to all the triage scales we have compared, there are no statistically significant differences between the assessment of the Institute of Emergency Medicine of Zadar County and the Zadar General Hospital Emergency Department.