Contemporary New Zealand coefficients for the Trauma Injury Severity Score: TRISS(NZ)

Schluter, Philip J., Cameron, Cate M., Davey, Tamzyn M., Civil, Ian, Orchard, Jodie, Dansey, Rangi, Hamill, James, Naylor, Helen, James, Carolyn, Dorrian, Jenny, Christey, Grant, Pollard, Cliff, & McClure, Rod J. (2009) Contemporary New Zealand coefficients for the Trauma Injury Severity Score: TRISS(NZ). New Zealand Medical Journal : Journal of the New Zealand Medical Association, 122(1302).

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Aims – To develop local contemporary coefficients for the Trauma Injury Severity Score in New Zealand, TRISS(NZ), and to evaluate their performance at predicting survival against the original TRISS coefficients. Methods – Retrospective cohort study of adults who sustained a serious traumatic injury, and who survived until presentation at Auckland City, Middlemore, Waikato, or North Shore Hospitals between 2002 and 2006. Coefficients were estimated using ordinary and multilevel mixed-effects logistic regression models. Results – 1735 eligible patients were identified, 1672 (96%) injured from a blunt mechanism and 63 (4%) from a penetrating mechanism. For blunt mechanism trauma, 1250 (75%) were male and average age was 38 years (range: 15-94 years). TRISS information was available for 1565 patients of whom 204 (13%) died. Area under the Receiver Operating Characteristic (ROC) curves was 0.901 (95%CI: 0.879-0.923) for the TRISS(NZ) model and 0.890 (95% CI: 0.866-0.913) for TRISS (P<0.001). Insufficient data were available to determine coefficients for penetrating mechanism TRISS(NZ) models. Conclusions – Both TRISS models accurately predicted survival for blunt mechanism trauma. However, TRISS(NZ) coefficients were statistically superior to TRISS coefficients. A strong case exists for replacing TRISS coefficients in the New Zealand benchmarking software with these updated TRISS(NZ) estimates.

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ID Code: 28087
Item Type: Journal Article
Refereed: Yes
Additional Information: Tamzyn Davey is currently employed by the Centre for Accident Research and Road Safety - Queensland, Queensland University of Technology.
ISSN: 1175-8716
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OTHER MEDICAL AND HEALTH SCIENCES (119900)
Divisions: Current > Research Centres > Centre for Accident Research & Road Safety - Qld (CARRS-Q)
Copyright Owner: Copyright 2009 New Zealand Medical Association
Deposited On: 26 Nov 2009 00:58
Last Modified: 25 Jun 2017 14:40

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