biostudies-literatureUnknown26(6)Cha MS<h4>Introduction</h4>Poisoning-induced out-of-hospital cardiac arrest (P-OHCA) is a leading mortality cause; however, no specific prognostic model exists for P-OHCA. In this study we aimed to develop and validate a novel scoring system, the WAIVOR score, which identifies factors associated with survival to hospital discharge in patients with P-OHCA, including the nature of the toxic agent.<h4>Methods</h4>In this retrospective nationwide observational study we analyzed 4,252 South Korean adult P-OHCA cases from 2013-2023. The study population was randomly stratified into derivation (n = 2,834) and validation (n = 1,418) cohorts. Independent factors associated with survival to hospital discharge were identified through multivariable logistic regression analysis, yielding adjusted odds ratiosThe western journal of emergency medicine1755-1763https://www.ebi.ac.uk/biostudies/studies/S-EPMC12698148biostudies-literatureFactors Associated with Survival to Hospital Discharge in Cardiac Arrest by Poisoning: WAIVOR Score.PMC12698148Cha MSSong MJKim JSfalseFactors Associated with Survival to Hospital Discharge in Cardiac Arrest by Poisoning: WAIVOR Score.<h4>Introduction</h4>Poisoning-induced out-of-hospital cardiac arrest (P-OHCA) is a leading mortality cause; however, no specific prognostic model exists for P-OHCA. In this study we aimed to develop and validate a novel scoring system, the WAIVOR score, which identifies factors associated with survival to hospital discharge in patients with P-OHCA, including the nature of the toxic agent.<h4>Methods</h4>In this retrospective nationwide observational study we analyzed 4,252 South Korean adult P-OHCA cases from 2013-2023. The study population was randomly stratified into derivation (n = 2,834) and validation (n = 1,418) cohorts. Independent factors associated with survival to hospital discharge were identified through multivariable logistic regression analysis, yielding adjusted odds ratios2025-01-01T00:00:00Z2025 Nov2026-06-06T01:23:38.665Z2026-05-24T03:11:42.619ZS-EPMC126981484138004710.5811/westjem.47064