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Classification of the severe trauma patient with the Abbreviated Injury Scale: degree of correlation between versions 98 and 2005 (2008 update)

Abajas Bustillo R, Leal Costa C, Ortego Mate MC, Zonfrillo MR, Seguí Gómez M, Durá Ros MJ

Gerencia de Emergencias 112 de Castilla y León. Facultad de Enfermería de la Universidad de Cantabria, Spain. Gerencia de Urgencias y Emergencias 061 de la Región de Murcia. Facultad de Enfermería de la Universidad Católica de Murcia (UCAM), Spain. Hasbro Children’s Hospital. Profesor asociado en la Alpert Medical School of Brown University, Providence, USA. Johns Hopkins Bloomberg School of Public Health y University of Virginia School of Medicine, USA.

Objectives. To explore differences in severity classifications according to 2 versions of the Abbreviated Injury Scale (AIS): version 2005 (the 2008 update) and the earlier version 98. To determine whether possible differences might have an impact on identifying severe trauma patients.
Methods. Descriptive study and cross-sectional analysis of a case series of patients admitted to two spanish hospitals with out-of-hospital injuries between February 2012 and February 2013. For each patient we calculated the Injury Severity Score (ISS), the New Injury Severity Score (NISS), and the AIS scores according to versions 98 and 2005.
Results. The sample included 699 cases. The mean Severity (SD) age of patients was 52.7 (29.2) years, and 388 (55.5%) were males. Version 98 of the AIS correlated more strongly with both the ISS (2.6%) and the NISS (2.9%).
Conclusion. The 2008 update of the AIS (version 2005) classified fewer trauma patients than version 98 at the severity levels indicated by the ISS and NISS.

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