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Original Research

Open Access

Effect of age on the interaction between heart rate and mortality in prehospital trauma care

  • Ki Hong Kim1,2
  • Kyoung Jun Song2,3
  • Sang Do Shin1,2
  • Young Sun Ro1,2
  • Ki Jeong Hong1,2
  • Joo Jeong2,4
  • Jeong Ho Park1,2

1Department of Emergency Medicine, Seoul National University College of Medicine and Hospital, 03087 Seoul, Republic of Korea

2Laboratory of Emergency Medical Services, Seoul National University Hospital Biomedical Research Institute, 07061 Seoul, Republic of Korea

3Department of Emergency Medicine, Seoul National University Boramae Medical Center, 20 Boramae-Ro 5 gil, Dongjak-gu, 07061 Seoul, Republic of Korea

4Department of Emergency Medicine, Seoul National University Bundang Hospital, 13622 Seoul, Republic of Korea

DOI: 10.22514/sv.2021.126 Vol.17,Issue 5,September 2021 pp.42-51

Submitted: 20 April 2021 Accepted: 21 May 2021

Published: 08 September 2021

*Corresponding Author(s): Kyoung Jun Song E-mail: skciva@gmail.com

Abstract

Objectives: The association between tachycardia and age in prehospital trauma mortality has not been thoroughly studied. The purpose of this study was to evaluate the interaction effects of age between prehospital tachycardia and mortality in adult trauma patients.

Methods: Adult trauma patients during 2012, 2013, and 2015 who were treated and transported by emergency medical services (EMS) were analyzed. Main exposure was tachycardia (>90 beat/min) measured at the scene. The primary outcome was mortality, the secondary outcome was worsened disability. Multivariable logistic regression with interaction models between tachycardia and age was used to calculate the adjusted odds ratio (AOR) with 95% confidence intervals after adjusting for confounders.

Results: A total of 35,542 patients were analyzed. Tachycardia had a significant association with mortality and worsened disability: 1.41 (1.28–1.54) for mortality and 1.25 (1.15–1.36) for worsened disability. In the interaction analysis, the AOR for mortality by tachycardia in age over 84 years was insignificant: 1.2 (1.11–1.3) for 15–64 years, 1.4 (1.29–1.52) for 65–84 years, 1.14 (0.92–1.42) for age over 85 years, respectively (p < 0.01 for interactions).

Conclusion: Tachycardia had a significant association with mortality and worsened disability in prehospital trauma patients and age over 85 years old had a significantly different interaction effect. Prehospital trauma care protocol should include recognizing severe cases based on the patient’s heart rate and age. It would be helpful in the decision-making at the scene such as trauma center transfer and advanced treatment.


Keywords

Major trauma; Prehospital vital sign; Tachycardia; Mortality


Cite and Share

Ki Hong Kim,Kyoung Jun Song,Sang Do Shin,Young Sun Ro,Ki Jeong Hong,Joo Jeong,Jeong Ho Park. Effect of age on the interaction between heart rate and mortality in prehospital trauma care. Signa Vitae. 2021. 17(5);42-51.

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