The AIS assigns a score ranging from 1 to 6 to injuries based on their severity:
AIS 1: Minor AIS 2: Moderate AIS 3: Serious AIS 4: Severe AIS 5: Critical AIS 6: Unsurvivable
Each injury is coded based on its location and nature, and then assigned an AIS score. Multiple injuries can be combined to generate an Injury Severity Score (ISS), which is used to assess the overall trauma burden.
