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Objective: The goal of this study is to systematically compare injury type and frequency for civilian motor vehicle crashes (MVCs) versus military mounted combat events using a method to group trauma with the AIS 2005 update, 2008 (AIS 08) dictionary.

Methods: Using the existing hierarchy for injury classification in the AIS 08 manual, two categorizations were created for data clustering. The first set combined similar AIS codes into 417 small, tissue-specific groups; whereas the second set combined injuries into 82 more broadly-defined groups within body regions. These classifications were applied to both military and civilian datasets to compare injury frequency (AIS severity 2-6) tallied per person. Civilian datasets included the National Automotive Sampling System - Crashworthiness Data System (NASS-CDS) and the Crash Injury Research and Engineering Network (CIREN). The military data was comprised of …