Associated Factors of Under and Over-Triage Based on The Emergency Severity Index; a Retrospective Cross-Sectional Study.

Introduction: Under-triage increases patients' risks for morbidity and mortality, whereas over-triage limits the resources available to sicker patients. This study aimed to determine the rates as well as associated factors of under-triage and over-triage in emergency department (ED), based on Emergency Severity Index (ESI) triage system.

Methods: In this retrospective cross-sectional study, triage level of ED patients based on the ESI version 4, was studied during a 9-month period in 2019.