| severity of illness index | Levels of severity of illness within a diagnostic group which are established by various measurement criteria. (12 Dec 1998) |
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| injury severity score | An anatomic severity scale based on the abbreviated injury scale (ais) and developed specifically to score multiple traumatic injuries. It has been used as a predictor of mortality. (12 Dec 1998) |
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| trauma severity indices | Systems for assessing, classifying, and coding injuries. These systems are used in medical records, surveillance systems, and state and national registries to aid in the collection and reporting of trauma. (12 Dec 1998) |