The counterintuitive effect of multiple injuries in severity scoring Open Access

Description: Conclusions In NISS, the same weight is assigned to the three worst injuries, although the contribution of the second and third to the probability of death is smaller than that of the worst one. An improvement of the predictive ability of NISS can be obtained adjusting for the number of injuries.
The counterintuitive effect of multiple injuries in severity scoring: a simple variable improves the predictive ability of NISS. Di Bartolomeo S, Ventura C, Marino M, Valent F, Trombetti S, De Palma R Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine 2011, 19:26 (full text)