BACKGROUND: The New Injury Severity Score (NISS) was proposed in 1997 to replace the Injury Severity Score (ISS) because it is more sensitive for mortality. We aim to test whether this is true in our patients. METHODS: This study was a retrospective review of data from 6,231 consecutive patients over 3 years in the trauma registry of a Level I trauma center studying outcome, ISS, and NISS. RESULTS: Misclassification rates were 3.97% for the NISS and 4.35% for the ISS. The receiver operating characteristic curve areas were 0.936 and 0.94, respectively. Neither the ISS nor the NISS were well calibrated (Hosmer-Lemeshow statistic, 36.11 and 49.28, respectively; p < 0.001). CONCLUSION: The NISS should not replace the ISS, as they share similar accuracy and calibration.
BACKGROUND: The New Injury Severity Score (NISS) was proposed in 1997 to replace the Injury Severity Score (ISS) because it is more sensitive for mortality. We aim to test whether this is true in our patients. METHODS: This study was a retrospective review of data from 6,231 consecutive patients over 3 years in the trauma registry of a Level I trauma center studying outcome, ISS, and NISS. RESULTS: Misclassification rates were 3.97% for the NISS and 4.35% for the ISS. The receiver operating characteristic curve areas were 0.936 and 0.94, respectively. Neither the ISS nor the NISS were well calibrated (Hosmer-Lemeshow statistic, 36.11 and 49.28, respectively; p < 0.001). CONCLUSION: The NISS should not replace the ISS, as they share similar accuracy and calibration.
Authors: Carlos Oliver Valderrama-Molina; Nelson Giraldo; Alfredo Constain; Andres Puerta; Camilo Restrepo; Alba León; Fabián Jaimes Journal: Eur J Orthop Surg Traumatol Date: 2016-12-20
Authors: Etienne St-Louis; Jade Séguin; Daniel Roizblatt; Dan Leon Deckelbaum; Robert Baird; Tarek Razek Journal: Pediatr Surg Int Date: 2016-11-21 Impact factor: 1.827
Authors: Jody A Vogel; Nicole Seleno; Emily Hopkins; Christopher B Colwell; Craig Gravitz; Jason S Haukoos Journal: Am J Emerg Med Date: 2015-07-06 Impact factor: 2.469