• Shir Lynn Lim, Cherylyn Toh, Stephanie Fook-Chong, Muhammad Yazid, Nur Shahidah, Qin Xiang Ng, Andrew Fw Ho, Shalini Arulanandam, Benjamin Sh Leong, Alexander E White, and Marcus Eh Ong.
• Department of Cardiology, National University Heart Centre Singapore, Singapore; Department of Medicine, National University of Singapore, Singapore; Pre-hospital and Emergency Research Center, Duke-NUS Medical School, Singapore.
• Resuscitation. 2022 Dec 1; 181: 404740-47.

ObjectiveFewer out-of-hospital cardiac arrest (OHCA) patients received bystander cardiopulmonary resuscitation during the COVID-19 pandemic in Singapore. We investigated the impact of COVID-19 on barriers to dispatcher-assisted cardiopulmonary resuscitation (DA-CPR).MethodsWe reviewed audio recordings of all calls to our national ambulance service call centre during the pandemic (January-June 2020) and pre-pandemic (January-June 2019) periods. Our primary outcome was the presence of barriers to DA-CPR. Multivariable logistic regression was used to assess the effect of COVID-19 on the likelihood of barriers to and performance of DA-CPR, adjusting for patient and event characteristics.ResultsThere were 1241 and 1118 OHCA who were eligible for DA-CPR during the pandemic (median age 74 years, 61.6 % males) and pre-pandemic (median age 73 years, 61.1 % males) periods, respectively. Compared to pre-pandemic, there were more residential and witnessed OHCA during the pandemic (87 % vs 84.9 % and 54 % vs 38.1 %, respectively); rates of DA-CPR were unchanged (57.3 % vs 61.1 %). COVID-19 increased the likelihood of barriers to DA-CPR (aOR 1.47, 95 % CI: 1.25-1.74) but not performance of DA-CPR (aOR 0.86, 95 % CI: 0.73 - 1.02). Barriers such as 'patient status changed' and 'caller not with patient' increased during COVID-19 pandemic. 'Afraid to do CPR' markedly decreased during the pandemic; fear of COVID-19 transmission made up 0.5 % of the barriers.ConclusionBarriers to DA-CPR were encountered more frequently during the COVID-19 pandemic but did not affect callers' willingness to perform DA-CPR. Distancing measures led to more residential arrests with increases in certain barriers, highlighting opportunities for public education and intervention.Copyright © 2022 The Author(s). Published by Elsevier B.V. All rights reserved.

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