Validation of the NULL‐EASE Score for Predicting Survival in a Multiethnic Asian Cohort of Out‐of‐Hospital Cardiac Arrest

Background NULL‐PLEASE is a simple and accurate clinical scoring system developed in a Western cohort of patients with out‐of‐hospital cardiac arrest (OHCA). The need for blood test results limits its use in early stages of care. We adapted and validated the NULL‐EASE score (without laboratory tests) in an independent, multiethnic Asian cohort of patients with out‐of‐hospital cardiac arrest. Methods and Results Using the Singapore OHCA registry, we included consecutive adult patients with out‐of‐hospital cardiac arrest who survived to hospital admission between April 2010 to December 2020. In‐hospital mortality was the primary outcome. Logistic regression analyses were performed with STATA MP v18. Of 3274 patients (median age 64, interquartile range 54–75; 67.9% male) included in the study, 2476 (75.6%) had in‐hospital mortality. NULL‐EASE score was significantly lower in survivors compared with nonsurvivors (median [inter quartile range] 3 [1–4] versus 6 [4–7]; P