• Ikwan Chang, Seung Chul Lee, Sang Do Shin, Kyoung Jun Song, Young Sun Ro, Jeong Ho Park, and So Yeon Kong.
• Department of Emergency Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea; Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, Seoul, Republic of Korea; Kangwon National University College of Medicine, Chuncheon, Gangwon-do, Republic of Korea. Electronic address: taketime97@hanmail.net.
• Resuscitation. 2018 Sep 1; 130: 49-56.

ObjectivesWe investigated the effect of bystander cardiopulmonary resuscitation (BCPR) with dispatcher assistance (DA) on neurological outcomes based on the response time interval (RTI) of the pre-hospital emergency medical service (EMS) among paediatric patients with out-of-hospital cardiac arrest (OHCA).MethodsThis retrospective registry study was conducted on paediatric patients (<19 years old) with OHCA who were assessed by EMS providers between 2012 and 2016. The primary outcome was good neurological recovery based on BCPR with or without DA and the EMS RTI. Differential effects of BCPR with DA based on the EMS RTI were analysed by multivariable logistic regression analysis with interaction terms.ResultsAdjusted odds ratios (AORs) and corresponding 95% confidence intervals (95% CIs) for good neurological recovery were 2.22 (1.27-3.88) for BCPR with DA and 1.51 (0.77-2.97) for BCPR without DA compared to no BCPR. The faster EMS RTI group (<5 min) had better neurological recovery than the later EMS RTI group (≥5 min) (AOR: 1.87 [1.04-3.29]). The AORs for good neurological recovery following BCPR with DA based on the EMS RTI were 2.52 (0.91-6.97) in the faster EMS RTI group and 2.17 (1.13-4.19) in the later EMS RTI group compared to the no BCPR group.ConclusionBCPR with DA and a faster EMS RTI were significantly associated with good neurological recovery in paediatric patients with OHCA. When the EMS RTI was delayed, the association of BCPR with DA with good neurological recovery was preserved in paediatric patients with OHCA.Copyright © 2018 Elsevier B.V. All rights reserved.

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