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Cardiac arrest
R-EDByUS score validated for OHCA prognostication
Prehospital prognostication after out-of-hospital cardiac arrest in tertiary care centers: the R-EDByUS score in the JAAM-OHCA registry
Resuscitation · 2026-10 · Added 7 October 2026
External validation of the R-EDByUS score, which predicts poor neurological outcome after cardiogenic OHCA using prehospital variables alone, in 29,345 patients from the JAAM-OHCA registry — it discriminated well (AUC ~0.91), and among patients with predicted probability ≥99% essentially all had poor outcomes.
- Study type
- Registry
- Design
- Retrospective nationwide registry cohort
- Participants
- 29,345 adults with presumed cardiogenic OHCA
- Main finding
- AUC 0.906 (prehospital ROSC cohort) and 0.913 (ongoing CPR cohort); 100% and 99.9% of patients with predicted probability ≥99% had unfavourable neurological outcome at 1 month
- Caveat
- Discrimination was lower in the ongoing-CPR cohort among patients receiving PCI, targeted temperature management or ECMO, and the score was developed for Japan's transport-all EMS model
- Bottom line
- Hypothesis-generating
Why it matters in Australia (Medium relevance). Uses only prehospital variables, so it maps onto the kind of termination-of-resuscitation and prognostication decisions paramedics here already make — but it was derived and validated in Japan's system, and Japanese EMS transport nearly all arrests, so it needs local validation before informing any decision not to transport.
Learning goal
Weigh early prognostic scores against uncertainty when discussing likely outcomes after cardiogenic out-of-hospital cardiac arrest.
More
- Topic: Cardiac arrest
- Daily scan: 7 October 2026
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