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Surgery Today
Published in: Surgery Today 11/2020

01-11-2020 | Original Article

The off-hour effect among severe trauma patients: a nationwide cohort study in Japan

Authors: Makoto Aoki, Toshikazu Abe, Yosuke Matsumura, Shuichi Hagiwara, Daizoh Saitoh, Kiyohiro Oshima

Published in: Surgery Today | Issue 11/2020

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Abstract

Purpose

To assess whether there are temporal differences altering the clinical outcomes of severe trauma patients in Japan.

Methods

This was a retrospective cohort study that used recorded data from the Japan Trauma Data Bank. Severe trauma patients who had an injury severity score of greater than 16 were included. The hospital arrival time was categorized into daytime (8 a.m.–7:59 p.m.) and nighttime (8 p.m.–7:59 a.m.). The hospital arrival day of the week was categorized into business days and non-business days. The primary outcome was in-hospital mortality.

Results

A total of 65,136 severe trauma patients were analyzed. In-hospital mortality was 15.6% in the daytime and 14.4% in the nighttime, and 15.5%, and 14.6% on business days and non-business days, respectively. Nighttime was associated with decreased in-hospital mortality compared to daytime (odds ratio = 0.817, 95% confidence interval = 0.764–0.874) and a non-business day was not associated with in-hospital mortality.

Conclusions

We did not find a negative off-hour effect on in-hospital mortality among severe trauma patients.
Appendix
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Metadata
Title
The off-hour effect among severe trauma patients: a nationwide cohort study in Japan
Authors
Makoto Aoki
Toshikazu Abe
Yosuke Matsumura
Shuichi Hagiwara
Daizoh Saitoh
Kiyohiro Oshima
Publication date
01-11-2020
Publisher
Springer Singapore
Published in
Surgery Today / Issue 11/2020
Print ISSN: 0941-1291
Electronic ISSN: 1436-2813
DOI
https://doi.org/10.1007/s00595-020-02027-1

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