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Related Experiment Videos

Predictive validity comparison of two five-level triage acuity scales.

Andrew Worster1, Christopher M Fernandes, Kevin Eva

  • 1Division of Emergency Medicine, McMaster University, Hamilton, Ontario Canada. aworster@rogers.com

European Journal of Emergency Medicine : Official Journal of the European Society for Emergency Medicine
|July 11, 2007
PubMed
Summary

The Emergency Severity Index and Canadian Triage and Acuity Scale show similar, moderate ability to predict emergency department resource use and patient outcomes. More accurate tools are needed for better prediction of emergency department resource utilization.

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Area of Science:

  • Emergency Medicine
  • Health Services Research

Background:

  • The Emergency Severity Index (ESI) and Canadian Triage and Acuity Scale (CTAS) are widely used five-level triage tools in North America.
  • These tools are utilized to assess patient acuity and estimate emergency department (ED) resource utilization.
  • A higher triage acuity level is generally presumed to correlate with increased resource needs.

Purpose of the Study:

  • To compare the predictive ability of ESI and CTAS for ED resource utilization.
  • To evaluate the capacity of ESI and CTAS to predict hospital admission and in-hospital mortality rates.

Main Methods:

  • An observational cohort study was conducted using a population-based random sample of patients from two EDs.
  • Data were collected over a 4-month period.

Related Experiment Videos

  • Correlational analyses examined the relationship between triage assessment and resource utilization, hospital admission, and mortality.

    • Main Results:

    • Analysis of 486 patients indicated the strongest correlation between ESI and diagnostic resources (r = -0.54).
    • The weakest correlation was observed between CTAS and mortality (r = -0.16).
    • No statistically significant differences were found between ESI and CTAS in predicting any of the measured outcomes.

    Conclusions:

    • ESI and CTAS demonstrate comparable, moderate abilities in predicting ED resource utilization and immediate patient outcomes.
    • Current triage acuity measures are insufficient for accurately predicting these outcomes.
    • Development of more precise tools is necessary for effective ED resource management and outcome prediction.