• Koichi Takaoka, Kensuke Ooya, Masaya Ono, Takahiro Kakeda, and Hyogo and Oita, Japan.
• J Emerg Nurs. 2021 Jul 1; 47 (4): 669-674.

ObjectiveThe Emergency Severity Index (ESI) is a highly reliable and valid triage scale that is widely used in emergency departments in not only English language regions but also other countries. The Japan Triage and Acuity Scale (JTAS) is frequently used for emergency patients, and the ESI has not been evaluated against the JTAS in Japan. This study aimed to examine the decision accuracy of the ESI for simulated clinical scenarios among nursing specialists in Japan compared with the JTAS.MethodA parallel group randomized trial was conducted. In total, 23 JTAS-trained triage nurses from 10 Japanese emergency departments were randomly assigned to the ESI or the JTAS group. Nurses independently assigned triage categories to 80 emergency cases for the assessment of interrater agreement.ResultsInterrater agreement between the expert and triage nurses was κ = 0.82 (excellent) in the ESI group and κ = 0.74 (substantial) in the JTAS group. In addition, interrater agreement by acuity was level 2 = 0.42 (moderate) in the ESI group and level 2 = 0.31 (fair) in the JTAS group. Interrater agreement for triage decisions was classified in a higher category in the ESI group than in the JTAS Scale group at level 2. Triage decisions based on the ESI in Japan maintained the same level of interrater agreement and sensitivity as those in other countries.ConclusionThese findings suggest that the ESI can be introduced in Japan, despite its different emergency medical background compared with other countries.Copyright © 2021 Elsevier Inc. All rights reserved.

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