TRISS and ASCOT scales TRISS

The combination of physiological and anatomical scores and other factors has yielded patient characterizations which accurately relate to survival/death outcome.

TRISS (Champion... et. al 1983) combines the Trauma Score, the Injury Severity Score, patient age, and injury type (blunt or penetrating). Logistic function norms relate

TRISS values to patient survival probability (Ps). Ps values are used in outcome evaluation methods which statistically compare the number of survivors in an institution with the number expected from norm predictions. In the late 1980s the Trauma Score was replaced in TRISS by the Revised Trauma Score ( Champion ef al 1989), which demonstrated improved predictive accuracy and reliability.

TRISS is now computed using admission values of the Revised Trauma Score (RTS) (Table 1), the Injury Severity Score (ISS) based on final diagnoses, patient age, and type of injury (blunt or penetrating). TRISS estimates Ps using the logistic function

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Table 1 Revised Trauma Score where

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