A motor vehicle crash injury specific map (ICD-9-CM to NASS/CDS)

Garthe, E.; Mango, N.

Affiliations

¹Garthe Associates, Marblehead, Massachusetts

Abstract

This paper discusses a methodology to map crash injuries from the format used in individual or state-wide hospital discharge data bases (ICD-9-CM) to the format used for the crash injury data base maintained as part of the National Highway Traffic Safety Administration's (NHTSA) National Accident Sampling System Crashworthiness Data System (NASS/CDS). A unique attribute of this map (referred to as "crashmap") is that it is specifically "tuned" to provide the best fidelity for the injuries sustained in motor vehicle crashes. The mapping method does not use confidential patient information or identifiers. By converting hospital discharge data bases, crashmap can greatly increase the number of severe cases for analysis beyond that available in NASS/CDS. The crashmap can also be used with linked crash data, such as data produced from NHTSA's Crash Outcome Data Evaluation System (CODES) project to provide more detailed and accurate injury information than is available from Police Accident Reports (PARs) alone. Results from analysis of 8000+ patients and 50,000 injuries with current mapping and scoring methods illustrate the issues involved in obtaining the correct severity scores, ISS values and counts for the NASS/CDS injury system with these tools. Examples of crashmap results are shown for the conversion of the pre-dots, severity, and "numerical consistency" of the injuries between the systems. Numerical consistency allows the comparisons of counts of injuries between the systems. Examples for crash injuries in NASS/CDS and hospital data show how numerical consistency helps in comparing counts of injuries between systems.

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Cited By (3)

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2002	Miller T, Zaloshnja E, Sheppard M. Are booster seats needed: comparing occupant outcomes ages 4–7 versus 8–13. In: 46th Annual Proceedings, Association for the Advancement of Automotive Medicine (AAAM). September 30–October 2, 2002; Tempe, AZ.
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