Status of Dispatcher-Provided Instructions to Bystanders of Out-of-Hospital Cardiac Arrest in Japan: An Analysis of the JAAM-OHCA Registry.
Acute medicine & surgery · 2025-01-01 · Registry study
Abstract
AIM: Dispatcher-provided cardiopulmonary resuscitation (CPR) instructions are recommended in current resuscitation guidelines. However, the factors influencing whether dispatchers provide such instructions remain unclear. This study investigated the implementation of dispatcher-provided CPR instructions and identified associated factors using a nationwide registry in Japan. METHODS: We conducted a retrospective analysis of out-of-hospital cardiac arrest (OHCA) cases registered in the Japanese Association for Acute Medicine OHCA Registry between June 2014 and August 2023. The cases were categorized into two groups according to whether the dispatchers provided CPR instructions. Multivariable logistic regression was performed to identify factors that were independently associated with dispatcher-provided instructions. RESULTS: Among 59,407 eligible OHCA cases, the dispatcher provided CPR instructions to the bystander for 27,414 (46.1%). Multivariable analysis revealed that female sex, a closer bystander-patient relationship, and unwitnessed arrest were significantly associated with a higher likelihood of dispatcher-provided instructions. By contrast, certain non-medical causes, such as traffic accidents, falls, and poisoning, were associated with lower dispatcher-provided instruction rates. Age showed a nonlinear association. Substantial temporal and regional variability was also observed. CONCLUSION: The likelihood of dispatcher-provided CPR instruction was influenced by a combination of patient, bystander, and system-level factors. These findings underscore the need for standardized dispatcher training and protocols to improve the recognition of OHCA and timely delivery of CPR instructions.
Tags
Bystanders & volunteers · Dispatchers & call takers · Time intervals