Kathrine B Sondergaard1, Steen Moller Hansen2, Jannik L Pallisgaard3, Thomas Alexander Gerds4, Mads Wissenberg5, Lena Karlsson5, Freddy K Lippert6, Gunnar H Gislason7, Christian Torp-Pedersen8, Fredrik Folke5. 1. Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark. Electronic address: kbso@dadlnet.dk. 2. Unit for Epidemiology and Biostatics, Aalborg University Hospital, Aalborg, Denmark. 3. Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark. 4. Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark. 5. Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark; Emergency Medical Services, Copenhagen, the Capital Region of Denmark, Denmark. 6. Emergency Medical Services, Copenhagen, the Capital Region of Denmark, Denmark. 7. Department of Cardiology, Copenhagen University Hospital Gentofte, Denmark; National Institute of Public Health, University of Southern Denmark, Copenhagen, Denmark. 8. Unit for Epidemiology and Biostatics, Aalborg University Hospital, Aalborg, Denmark; Department of Health Science and Technology, Aalborg University, Aalborg, Denmark; Department of Cardiology, Aalborg University Hospital, Denmark.
Abstract
AIMS: Despite wide dissemination of automated external defibrillators (AEDs), bystander defibrillation rates remain low. We aimed to investigate how route distance to the nearest accessible AED was associated with probability of bystander defibrillation in public and residential locations. METHODS: We used data from the nationwide Danish Cardiac Arrest Registry and the Danish AED Network to identify out-of-hospital cardiac arrests and route distances to nearest accessible registered AED during 2008-2013. The association between route distance and bystander defibrillation was described using restricted cubic spline logistic regression. RESULTS: We included 6971 out-of-hospital cardiac arrest cases. The proportion of arrests according to distance in meters (≤100, 101-200, >200) to the nearest accessible AED was: 4.6% (n=320), 5.3% (n=370), and 90.1% (n=6281), respectively. For cardiac arrests in public locations, the probability of bystander defibrillation at 0, 100 and 200m from the nearest AED was 35.7% (95% confidence interval 28.0%-43.5%), 21.3% (95% confidence interval 17.4%-25.2%), and 13.7% (95% confidence interval 10.1%-16.8%), respectively. The corresponding numbers for cardiac arrests in residential locations were 7.0% (95% confidence interval -2.1%-16.1%), 1.5% (95% confidence interval 0.002%-2.8%), and 0.9% (95% confidence interval 0.0005%-1.7%), respectively. CONCLUSIONS: In public locations, the probability of bystander defibrillation decreased rapidly within the first 100m route distance from cardiac arrest to nearest accessible AED whereas the probability of bystander defibrillation was low for all distances in residential areas.
AIMS: Despite wide dissemination of automated external defibrillators (AEDs), bystander defibrillation rates remain low. We aimed to investigate how route distance to the nearest accessible AED was associated with probability of bystander defibrillation in public and residential locations. METHODS: We used data from the nationwide Danish Cardiac Arrest Registry and the Danish AED Network to identify out-of-hospital cardiac arrests and route distances to nearest accessible registered AED during 2008-2013. The association between route distance and bystander defibrillation was described using restricted cubic spline logistic regression. RESULTS: We included 6971 out-of-hospital cardiac arrest cases. The proportion of arrests according to distance in meters (≤100, 101-200, >200) to the nearest accessible AED was: 4.6% (n=320), 5.3% (n=370), and 90.1% (n=6281), respectively. For cardiac arrests in public locations, the probability of bystander defibrillation at 0, 100 and 200m from the nearest AED was 35.7% (95% confidence interval 28.0%-43.5%), 21.3% (95% confidence interval 17.4%-25.2%), and 13.7% (95% confidence interval 10.1%-16.8%), respectively. The corresponding numbers for cardiac arrests in residential locations were 7.0% (95% confidence interval -2.1%-16.1%), 1.5% (95% confidence interval 0.002%-2.8%), and 0.9% (95% confidence interval 0.0005%-1.7%), respectively. CONCLUSIONS: In public locations, the probability of bystander defibrillation decreased rapidly within the first 100m route distance from cardiac arrest to nearest accessible AED whereas the probability of bystander defibrillation was low for all distances in residential areas.
Authors: Michael S Connolly; Judah P Goldstein Pcp; Margaret Currie; Alix J E Carter; Steve P Doucette; Karen Giddens; Katherine S Allan; Andrew H Travers; Beau Ahrens; Daniel Rainham; John L Sapp Journal: CJC Open Date: 2021-12-30