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Standardized Comparison of Triage in EMS

This study has been completed.
Information provided by (Responsible Party):
St. Michael's Hospital, Toronto Identifier:
First received: May 1, 2007
Last updated: May 23, 2014
Last verified: May 2014
The objective of this study is to evaluate the reliability and validity of acuity estimates by paramedics employing the Canadian Triage Acuity Scale (CTAS) in the out of hospital setting. The study has the potential to help guide policy decisions pertaining to the safe transfer of ambulance patients to alternative destinations reducing ED overcrowding and ambulance off load time. Emergency Department triage nurses employ the same acuity scale and if this study is successful the emergency departments and the EMS services could communicate about capacity to handle patients based on acuity, volumes and waiting times.


Study Type: Observational
Study Design: Observational Model: Case-Only
Time Perspective: Prospective
Official Title: Study to Evaluate the Safety and Efficacy of Redirecting Ambulance Patients to Destinations Based on Acuity

Further study details as provided by St. Michael's Hospital, Toronto:

Primary Outcome Measures:
  • CTAS level assignment [ Time Frame: At the time of departue from scene and arrival at hospital ]
    Reliability and validity of CTAS level assignment by paramedics and EMS service implementation

Enrollment: 928
Study Start Date: February 2003
Study Completion Date: July 2009
Primary Completion Date: July 2009 (Final data collection date for primary outcome measure)
  Show Detailed Description


Ages Eligible for Study:   Child, Adult, Senior
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Sampling Method:   Probability Sample
Study Population

This study is taking place in 7 EMS systems in Ontario: Peterborough, Thunder Bay, Hamilton, Simcoe/Muskoka, Durham, Peel, and Toronto.

The participants(Both Primary care paramedics and Advance Care Parmaeidcs)are riding as civilian observers under contract to the Sunnybrook and Women's College Health Sciences Centre Research Institute and have signed liability release forms.

The main focus of the SCORE study is to determine how well paramedics in the field can correctly assign CTAS scores. By showing that it can be done reliably, decisions can be made on suitable destinations, especially for the low acuity patient.


Inclusion Criteria:

  • All patients
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00468780

Canada, Ontario
Hamilton Health Sciences
Hamilton, Ontario, Canada, L8V 1C3
Sunnybrook-Osler Centre for Prehospital Care
Toronto, Ontario, Canada, M9W 7K6
Sponsors and Collaborators
St. Michael's Hospital, Toronto
Principal Investigator: Laurie Morrison, MD Sunnybrook Health Sciences Center
  More Information

Additional Information:
Responsible Party: St. Michael's Hospital, Toronto Identifier: NCT00468780     History of Changes
Other Study ID Numbers: 724180022
Study First Received: May 1, 2007
Last Updated: May 23, 2014

Keywords provided by St. Michael's Hospital, Toronto:
Canadian Triage Acuity Scale
triage nurse
triage levels
inter-rater reliability
health services outcomes processed this record on July 21, 2017