• Chika Nishiyama, Kosuke Kiyohara, Taku Iwami, Sumito Hayashida, Takeyuki Kiguchi, Tasuku Matsuyama, Yusuke Katayama, Takeshi Shimazu, and Tetsuhisa Kitamura.
• Department of Critical Care Nursing, Graduate School of Medicine, Kyoto University, Japan.
• Resusc Plus. 2021 Mar 1; 5: 100088.

BackgroundThe coronavirus disease (COVID-19) pandemic may have negatively affected bystander interventions, emergency medical service (EMS) personnel activities, and patient outcomes after out-of-hospital cardiac arrest (OHCA). This study assessed bystander interventions, EMS activities, and patient outcomes during the COVID-19 pandemic era and compared them with those during the non-COVID-19 pandemic era in Osaka City, Japan, where public-access automated external defibrillators (AEDs) are well established.MethodsWe conducted this population-based cohort study that included all cases with non-traumatic OHCA treated by EMS personnel and excluded cases with no resuscitation attempt, traumatic cases, cases occurring in healthcare facilities, or cases witnessed by EMS personnel. Data were compared between the COVID-19 pandemic period (February 1, 2020 to July 31, 2020) and the non-COVID-19 pandemic period (February 1, 2019 to July 31, 2019).ResultsDuring the study periods, 1687 patients were eligible for analyses (COVID-19: n = 825; non-COVID-19: n = 862). Patients with OHCA during the COVID-19 pandemic period were significantly less likely to receive bystander cardiopulmonary resuscitation (CPR) (COVID-19: 33.0%; non-COVID-19: 41.3%; p < 0.001) and public-access AED pad application (COVID-19: 2.9%; non-COVID-19: 6.1%; p = 0.002) compared with patients during the non-COVID-19 pandemic period. There were no significant differences in 1-month survival with favorable neurological outcomes between the two periods (COVID-19: 4.6%; non-COVID-19: 6.1%; p = 0.196).ConclusionThe COVID-19 pandemic period did not affect patient outcomes after OHCA but changed bystander behaviors in Osaka City, Japan.© 2021 The Author(s).

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