DPH: The Connecticut Crash Outcome Data Evaluation System (CODES)
Injury Prevention Program

The Connecticut Crash Outcome

Data Evaluation System (CT CODES) {CODES chain}


The Crash Outcome Data Evaluation System (CODES) Project is a set of State-based operational data systems that tract victims of a motor vehicle crashes from the scene through the health care system to determine crash outcome in terms of mortality, injury and its severity, and health care costs. CODES is used to identify traffic safety problems, support traffic safety decision makers, support traffic safety legislation, and educate the public.


The CODES Project generates linked motor vehicle crash and injury outcome data.  The linkage is important since police crash data include information that describes the injured and uninjured occupants in terms of their utilization of safety countermeasures but not their medical outcome or the financial consequences of their injuries.  Injury data collected at the scene, en route to the emergency department, after inpatient admission, or as part of the insurance claims process, do not include the crash information.


Since 1997, Connecticut has received funds from the National Highway Traffic Safety Administration (NHTSA) to support CODES linkages.  Currently, Connecticut has linked emergency department and hospital inpatient data with crash data for the years 1999 and 2001-2005.  Additional years of the above-mentioned data, along with supplementary data sources (e.g., mortality, trauma, emergency medical services, and driver and car registration) are in the process of being obtained to enrich the CODES information capacity. 


Linkage of statewide crash to injury data combines the benefits of both types of data and generates population-based outcome information about the successes (those who use the countermeasure and receive no injury), and those who are injured but less severely because of the countermeasure.  This type of comprehensive information is necessary, in addition to information about the non-users who, as expected, are injured, to accurately determine the full impact of the effectiveness of highway safety and injury control initiatives directed at specific crash, vehicle, and person characteristics.


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Content Last Modified on 3/12/2013 8:34:27 AM