Simplifying physiologic injury severity measurement for predicting trauma outcomes

Area of Science:

• Trauma research
• Clinical outcomes assessment
• Emergency medicine

Background:

• The Revised Trauma Score (RTS) is a standard for assessing physiologic injury severity in trauma patients.
• A significant limitation of RTS is its high rate of missing data, impacting its clinical utility.
• This study aimed to compare various physiologic injury parameters for predicting trauma mortality.

Purpose of the Study:

• To evaluate the predictive accuracy of different trauma severity scores for mortality.
• To identify alternative or combined parameters that mitigate the missing data issue inherent in RTS.
• To enhance the reliability of physiologic injury assessment in large-scale trauma research.

Main Methods:

• Analysis of adult patients from the National Trauma Data Bank (NTDB version 7.0).
• Comparison of RTS, systolic blood pressure (SBP), shock status, Glasgow Coma Scale-Total (GCS-T), and Glasgow Coma Scale-Motor (GCS-M).
• Calculation of Areas Under the Receiver Operating Characteristic Curves (AUROC) for unadjusted and multivariate models.

Main Results:

• RTS demonstrated high predictive accuracy (AUROC=0.85) but had 21% missing data.
• SBP and shock showed lower predictive accuracy (AUROC=0.67 and 0.66) with substantially less missing data.
• Combining GCS-M with SBP or shock yielded AUROC comparable to RTS (0.85) while reducing missing data by approximately 80,000 cases.

Conclusions:

• RTS offers superior discriminatory power compared to SBP, shock, or GCS alone.
• The combination of SBP and GCS-M provides a more reliable and equally effective method for assessing trauma severity due to less missing data.
• This combined approach enhances the practical application of physiologic injury assessment in trauma outcome studies.