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                Assessment of Characteristics of State Data Linkage Systems
**Description:**
        This guide identifies facilitating and impeding factors in the development and implementation of systems linking police crash reports to medical records. These systems try to map crash data to real injury outcomes in an effort to improve the data quality and availability for non-fatal injury crashes. The primary system used by states is the Crash Outcome Data Evaluation System (CODES); however, there are other systems. The guide includes the results of a questionnaire based on feedback from twenty-five state responses, focus groups with nineteen states, and a literature search to review practices and get feedback on efforts to collect, link, analyze, and report data.
    
          **Tool Type:**
        Informational Guide
    
    
    
          **Owner Source:**
        federal
    
          **Sponsor/Owner:**
        National Highway Traffic Safety Administration (NHTSA)
    
        **Published:**
      2015
    
        **Availability:**
      The guide is free of charge at the following link:Assessment of Characteristics of State Data Linkage Systems
    
          **Disclaimer:**
        This information is disseminated under the sponsorship of the U.S. Department of Transportation in the interest of information exchange. The U.S. Government assumes no liability for the use of the information contained herein. This information does not constitute a standard, specification, or regulation. The U.S. Government does not endorse products or manufacturers. Trademarks or manufacturer's names appear in this information only because they are considered essential to the objective of this publication.
          Any opinions, findings, and conclusions or recommendations, and translations thereof, expressed in this publication are those of the author(s) and do not necessarily reflect the views of the Federal Highway Administration. U.S. DEPARTMENT OF TRANSPORTATION

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