Cardiac Arrest Survival Score (CRASS) - a Tool to Predict Good Neurological Outcome After Out of Hospital Cardiac Arrest

This study is a retrospective analysis of 8,603 prospectively documented OHCA patients between 01.01.2010 and 31.12.2016 within the German Resuscitation Registry (GRR),4 attended by EMS. The GRR represents currently approximately 160 emergency medical systems who record data on out-of-hospital resuscitation attempts throughout Germany, thus encompassing approximately 30 million citizens (total population of Germany counts 85 million).

The German Resuscitation Registry for out-of-hospital cardiac arrest is divided into two different datasets:

1. The 'Preclinical care' dataset originated from the Utstein-style template aiming at documentation of pre-hospital logistic issues, presumed aetiology, resuscitation therapy and patient's initial outcome including 118 variables.12
2. The 'Postresuscitation care' dataset is aimed at documentation of in-hospital post-resuscitation efforts. The participating hospitals can choose between a basic version which includes the use of coronary angiography, temperature management and the status at hospital discharged and an extended version. This includes 156 variables and inquires especially the status at admission, initial blood gas analysis, temperature management, coronary angiography and survival at 24h after cardiac arrest, 30 days and at hospital discharge exactly.12 Participation in the registry is voluntary. The participating emergency medical services and hospitals submit their data anonymously into a central database via a web-based application. Multiple plausibility checks have been implemented into this application in order to improve data quality. The registry is organised and funded by the German Society of Anaesthesiology and Intensive Care Medicine (DGAI).