@article{ref1,
title="Development and validation of a new ICD-10-based trauma mortality prediction scoring system using a Japanese national inpatient database",
journal="Injury prevention",
year="2017",
author="Wada, Tomoki and Yasunaga, Hideo and Yamana, Hayato and Matsui, Hiroki and Matsubara, Takehiro and Fushimi, Kiyohide and Nakajima, Susumu",
volume="23",
number="4",
pages="263-267",
abstract="INTRODUCTION: To develop and validate a new trauma mortality prediction scoring system based on International Statistical Classification of Diseases (ICD)-10 codes, using a Japanese administrative claims and discharge abstract database. <br><br>METHODS: This retrospective observational study used the Japanese Diagnosis Procedure Combination database. Injuries were categorised into 33 groups with 5 additional groups based on injury sites and types. A multivariable logistic regression analysis was performed for in-hospital mortality in a derivation cohort after adjusting for the 38 groups, patient's sex, age and Charlson Comorbidity Index score. Each variable was assigned a score that was equal to the value of the regression coefficient. The new severity score was defined as the sum of the scores. The new scoring system was tested in a validation cohort. <br><br>RESULTS: The mortality rates were 2.4% (9270/393 395) and 2.5% (8778/349 285) in the derivation and validation cohorts, respectively. The area under the receiver operating curve (AUROC) of the new scoring system was 0.887 (95% CI 0.884 to 0.890) in the validation cohort. Subgroup analyses showed that the scoring system retained high predictive performance both for patients <65 years (AUROC 0.934, 95% CI 0.928 to 0.939) and for elderly patients at the age of ≥65 years (AUROC 0.825, 95% CI 0.820 to 0.829). <br><br>CONCLUSIONS: A new ICD-10-based injury severity scoring system was developed and validated. Further studies are required to validate the scoring system in other databases.<br><br>Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://www.bmj.com/company/products-services/rights-and-licensing/<p /> <p>Language: en</p>",
language="en",
issn="1353-8047",
doi="10.1136/injuryprev-2016-042106",
url="http://dx.doi.org/10.1136/injuryprev-2016-042106"
}