• Yun Suk Pak, Young Sun Ro, Se Hyung Kim, So Hyun Han, Sung Keun Ko, Taehui Kim, Young Ho Kwak, Tag Heo, and Sungwoo Moon.
• National Emergency Medical Center, National Medical Center, Seoul, Korea.
• J. Korean Med. Sci. 2021 Apr 26; 36 (16): e121.

BackgroundThe purpose of this study was to review the nationwide emergency care-related health policies during the coronavirus disease 2019 (COVID-19) pandemic disaster in Korea and to analyze the effects of the policies on the safety of patients who visit emergency departments (EDs) during this period.MethodsThis study is a quasi-experiment study. The study population was patients who visited all 402 EDs in Korea between December 31, 2019 and May 13, 2020, using the National Emergency Department Information System (NEDIS) database. The study period was classified into 5 phases according to the level of national crisis warning of infectious disease and the implementation of emergency care-related health policies, and all study phases were 27 days. The primary outcome was in-hospital mortality, and the secondary outcome was length of stay (LOS) in the ED during the COVID-19 outbreak.ResultsThe number of ED visits during the study period was 2,636,341, and the in-hospital mortality rate was 1.4%. The number of ED visits decreased from 803,160 in phase 1 to 496,619 in phase 5 during the study period. For in-hospital mortality, the adjusted odds ratio (OR) (95% confidence interval) was 0.77 (0.74-0.79) in phase 5 compared to phase 3. Additionally, by subgroup, the ORs were 0.69 (0.57-0.83) for the patients with acute myocardial infarction and 0.76 (0.67-0.87) for severe trauma in phase 5 compared to phase 3. The ED LOS increased while the number of ED visits decreased as the COVID-19 pandemic progressed, and the ED LOS declined after policy implementation (beta coefficient: -5.3 [-6.5 to -4.2] minutes in phase 5 compared to phase 3).ConclusionImplementing appropriate emergency care policies in the COVID-19 pandemic would have contributed to improving the safety of all emergency patients and reducing in-hospital mortality by preventing excessive deaths.© 2021 The Korean Academy of Medical Sciences.

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