Purpose of the study; 
Using standardised reporting templates has been commonplace for the reporting of cardiac arrest outcomes for the last 25 years. In 2002 ILCOR published templates for in and out of hospital cardiac arrest and these were harmonised in 2004 in an attempt to standardise outputs of audit and research.1 2015 saw the publication of a standardised reporting template for OHCA Registries to facilitate comparison of registries and their results.2 This review of the literature sets out to assess the application of this template. In addition to this the population served, numerators and denominators and tracking of outcomes (among other variables) will be collated to be able to describe the comparability of global registry studies. This review will also scope out the utility of the template as a quality assessment tool. 
Methods; 
A review of published registry studies. Multicentre and national registry studies will be identified through systematic review of the literature. The Utstein template will be used as a quality assessment tool to collect the data.
Results;
Provisional results show that the suggested reporting template is not followed in all studies. Typically the missing information concerns system descriptions, definitions and completeness of case ascertainment checks.
Conclusions;
The standardised reporting of OHCA Registry studies is integral to the comparability of results across regions and nations. This work will inform the interpretation of OHCA registry studies moving forwards.

1. Jacobs et al. Cardiac arrest and cardiopulmonary resuscitation outcome reports - Update and simplification of the Utstein templates for resuscitation registries Circulation 2004 110(21) 
2. Perkins et al. Cardiac Arrest and Cardiopulmonary Resuscitation Outcome Reports: Update of the Utstein Resuscitation Registry Templates for Out-of-Hospital Cardiac Arrest A Statement for Healthcare Professionals From a Task Force of ILCOR Resuscitation 96 p328-340

Utstein recommendations for reporting Out of Hospital Cardiac Arrest (OHCA) registry studies - a review of the literature.