  Objectives: To obtain a better estimate of the mortality of individuals
suffering from blunt force trauma, including co-morbidity. Methodology: The
Injury severity Score (ISS) is the default world standard for assessing the
severity of multiple injuries. ISS is a mathematical fit to empirical field
data. It is demonstrated that ISS is proportional to the Gibbs/Shannon Entropy.
A new Entropy measure of morbidity from blunt force trauma including
co-morbidity is derived based on the von Neumann Entropy, called the
Abbreviated Morbidity Scale (AMS). Results: The ISS trauma measure has been
applied to a previously published database, and good correlation has been
achieved. Here the existing trauma measure is extended to include the
co-morbidity of disease by calculating an Abbreviated Morbidity Score (AMS),
which encapsulates the disease co-morbidity in a manner analogous to AIS, and
on a consistent Entropy base. Applying Entropy measures to multiple injuries,
highlights the role of co-morbidity and that the elderly die at much lower
levels of injury than the general population, as a consequence of co-morbidity.
These considerations lead to questions regarding current new car assessment
protocols, and how well they protect the most vulnerable road users. Keywords:
Blunt Force Trauma, Injury Severity Score, Co-morbidity, Entropy.
