The TRISS (Revised Trauma Score and Injury Severity Score) method of trauma care evaluation was applied to 476 consecutive trauma patients admitted to our medical center over a 6-month period. Male to female ratio was 8:1, with a mean age of 24.7 years. Penetrating injury was the most common mechanism of injury (62%), with the chest as the most common region injured (36%). Mean probability of survival of 476 patients was 0.9802 and a predicted mortality of 9.4 patients. The overall mortality was 5.4 per cent with 26 actual deaths. As 93 per cent of patients had injuries to isolated anatomic regions, using the TRISS method, assigning numerical values to noninjured anatomic regions mathematically increased their probability of survival, even though the isolated injury was life-threatening. Consideration should be taken before adapting the TRISS method as the gold standard in evaluating trauma care in the local setting