• Asami Okada, Yohei Okada, Hiromichi Narumiya, Wataru Ishii, Tetsuhisa Kitamura, Toshio Osamura, and Ryoji Iiduka.
• Emergency and Critical Care Medicine, Kyoto Daini Sekijuji Byoin, Kyoto, Japan.
• BMJ Open. 2020 Nov 9; 10 (11): e033822.

ObjectivesTo examine the association between body temperature (BT) on hospital arrival and in-hospital mortality among paediatric trauma patients.DesignA retrospective cohort study.SettingJapan Trauma Data Bank (JTDB, which is a nationwide, prospective, observational trauma registry with data from 235 hospitals).ParticipantsPaediatric trauma patients <16 years old who were transferred directly from the scene of injury to the hospital and registered in the JTDB from January 2004 to December 2017 were included. We excluded patients >16 years old and those who developed cardiac arrest before or on hospital arrival.Primary OutcomeThe association between BT on hospital arrival and in-hospital mortality. We conducted multivariate logistic regression analyses to calculate the adjusted ORs, with their 95% CIs, of the association between BT and in-hospital mortality.ResultsA total of 9012 patients were included (median age: 9 years (IQR, 6.0-13.0 years), mortality: 2.5% (mortality number was 226 in total 9012 patients)). In the multivariate logistic regression analysis, the corresponding adjusted ORs of BT <36.0°C and BT ≥37.0°C, relative to a BT of 36°C-36.9°C, for in-hospital mortality were 2.83 (95% CI: 1.85 to 4.33) and 0.93 (95% CI: 0.53 to 1.63), respectively.ConclusionsIn paediatric patients with hypothermia (BT <36.0°C) on hospital arrival, a clear association with in-hospital mortality was observed; no such association was observed between higher BT values (≥37.0°C) and outcomes.© Author(s) (or their employer(s)) 2020. Re-use permitted under CC BY-NC. No commercial re-use. See rights and permissions. Published by BMJ.

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