The present purpose was to illustrate the range of severity scores amo
ng trauma patients. A computerised conversion of ICD-9CM injury diagno
ses into scores for severity of injury was processed on data of 36,178
trauma patients. More than 94% of the patients had injuries of minor
severity. The probability of mortality was .67 when the Injury Severit
y Score (ISS) was greater than or equal to 16.