Revised Trauma Score Calculator

The Revised Trauma Score condenses three physiological signals — neurological status (via Glasgow Coma Scale), circulatory status (systolic blood pressure), and respiratory status (respiratory rate) — into coded bands of 0 to 4, then combines them using empirically derived regression weights rather than simple addition. GCS carries the heaviest weight (0.9368) because central nervous system status proved the single strongest independent predictor of survival in the derivation data, ahead of even blood pressure and respiratory rate, which each carry smaller coefficients (0.7326 and 0.2908 respectively). Two related versions exist for different purposes: Triage-RTS (T-RTS) uses the simple unweighted sum of the three coded values (0-12) and is designed for rapid field triage decisions — who goes to the trauma center first — while the full weighted RTS (0-7.8408) is intended for retrospective outcome prediction and research, feeding into the combined TRISS (Trauma Score - Injury Severity Score) methodology that also incorporates anatomic injury severity and patient age to estimate overall survival probability. A lower coded value in any component reflects worse physiology, and a low RTS in the field is a trigger for immediate transport to the highest level of trauma care available.

Howard Champion and colleagues developed the original Trauma Score in 1981, combining GCS with respiratory and circulatory parameters, along with capillary refill and respiratory effort measures that proved difficult to assess reliably and reproducibly in the prehospital setting. Field experience through the 1980s showed these two additional components added complexity without meaningfully improving prediction, prompting Champion's team to simplify the model. Champion published the Revised Trauma Score in the Journal of Trauma in 1989, removing the unreliable capillary-refill and respiratory-effort components and re-deriving the weighting coefficients from a larger, more robust dataset. Charles Boyd and colleagues subsequently incorporated RTS into the TRISS methodology, combining physiological score with the Injury Severity Score and patient age into a unified survival-probability model that became a standard tool for trauma system quality benchmarking. RTS was adopted into Advanced Trauma Life Support (ATLS) training and remains one of the standard field-triage and outcome-prediction tools referenced in emergency medicine and trauma surgery today.