The AIS (Abbreviated Injury Scale) was developed to provide researchers with a simple numerical method for ranking and comparing injuries by severity, and to standardise the terminology used to describe injuries. The AIS is universally accepted as the foundation of injury severity scaling systems. AAAM's Committee on Injury Scaling is the parent organisation of the AIS. The following improvements have been incorporated: * Extensive rules and specific instructions throughout the dictionary which adhere to standardised coding principles; * Clarification of the rules for calculating the Injury Severity Score when external injuries occur; and * Inclusion of the Organ Injury Scale (OIS) grading system developed by the American Association for the Surgery of Trauma where these scores have appropriate matches to existing injury descriptions in the dictionary to facilitate wider application in clinical research. (Author/publisher)
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