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  • Title: Utilization of state-wide hospital separations data and the injury impairment scale to assess the incidence of spinal cord injury arising from motor vehicle traffic crashes.
    Author: O'Connor P.
    Journal: Traffic Inj Prev; 2004 Dec; 5(4):362-7. PubMed ID: 15545075.
    Abstract:
    The objectives of this study were to determine whether routine state-wide hospitalization data can be used for population level surveillance of the incidence of spinal cord injury (SCI) from motor vehicle traffic crashes (MVTCs) and to verify the coverage of the Australian Spinal Cord Injury Register. A method was developed to identify new injury incidents from routine South Australian hospitalization data. Mapping software was then used to derive the Abbreviated Injury Scale (AIS) and Injury Impairment Scale (IIS) codes for each incident case of spinal injury using the principal diagnosis code on the hospital data file. IIS code values in the range from 3 to 6 were considered to be comparable with the SCI coding criteria utilized by the Australian Spinal Cord Injury Register (ASCIR) which were based on the criteria of the American Spinal Injury Association. The number of estimated new incident cases of SCI based on the IIS coding of hospitalization data was compared with the actual number reported from the ASCIR. The case numbers were highly comparable overall and also by time and age group suggesting that the coverage of the ASCIR was very high. The results of the study support use of the IIS for estimating incident case numbers of MVTC-related SCI from routine state-wide hospitalization data. If routine hospital separations data elsewhere were suitable for the purpose and the IIS also proves to be applicable to non-MVTC-related SCI, the incidence of SCI could be monitored in state and national populations using the IIS and this could provide an alternative data source where registers of SCI do not exist. In addition, the IIS provides a means to assess coverage where registers do exist.
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