The Visualization of Uncertainty in Clinical Diagnostic Reasoning for Pulmonary Embolism

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Ghazwan Altabbaa, University of Calgary
ClinicalTrials.gov Identifier:
NCT01752673
First received: December 12, 2012
Last updated: December 14, 2012
Last verified: December 2012
  Purpose

Medical reasoning is a form of inquiry that examines the thought processes involved in making medical decisions. When physicians are faced with patients' symptoms or signs, their thought processes follow either direct shortcuts to suspect a diagnosis or go into a deeper and more analytic process to reach a diagnosis. The second pathway is less prone to biases and errors. This study explores whether the use of an interactive visual display of probabilities of pulmonary embolism generated from positive or negative test results will increase the adherence to evidence based guidelines in the diagnosis of pulmonary embolism.


Condition Intervention
Pulmonary Embolism
Diagnostic Uncertainty
Clinical Reasoning
Evidence Based Medicine
Visualization of Uncertainty
Other: Visualized pulmonary embolism computer task model
Other: Didactic review lecture

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Open Label
Official Title: The Visualization of Uncertainty in Clinical Diagnostic Reasoning for Pulmonary Embolism: a Randomized Controlled Trial.

Resource links provided by NLM:


Further study details as provided by University of Calgary:

Primary Outcome Measures:
  • Concordance with medical diagnostic reasoning pathway for pulmonary embolism. [ Time Frame: Paper-based clinical case scenarios were completed within 2 hour after either intervention. ] [ Designated as safety issue: No ]
    Concordance with medical diagnostic reasoning pathway for a case presentation suggestive of pulmonary embolism will be reflected by whether participants are stopping prematurely or proceeding with diagnostic steps inappropriately.


Secondary Outcome Measures:
  • Time. [ Time Frame: Paper-based clinical case scenarios were completed within 2 hour after either intervention. ] [ Designated as safety issue: No ]
    The overall time taken to solve each clinical scenario may give insight to which decision making process was predominant to solve each clinical scenario.


Other Outcome Measures:
  • Survey. [ Time Frame: Survey was completed within 2 hours after completion of either intervention. ] [ Designated as safety issue: No ]
    The participants' responses to the satisfaction survey will provide feedback about the need for improvement or modification in interface of software


Enrollment: 30
Study Start Date: March 2011
Study Completion Date: October 2011
Primary Completion Date: October 2011 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Experimental: Visualized pulmonary embolism computer task model
This group of participants was presented and trained to use a visual representation of diagnostic pathway for pulmonary embolism. The design of this visual representation is based on Bayes theorem and cognition enhancing visual design principles.
Other: Visualized pulmonary embolism computer task model
This group of participants was presented and trained to use a visual representation of diagnostic pathway for pulmonary embolism. The design of this visual representation is based on Bayes theorem and cognition enhancing visual design principles.
Active Comparator: Didactic review pulmonary embolism lecture
This group of participants was presented with a didactic lecture covering the diagnostic approach of pulmonary embolism.
Other: Didactic review lecture
This group of participants was presented with a didactic lecture covering the diagnostic approach of pulmonary embolism.

  Eligibility

Ages Eligible for Study:   24 Years to 65 Years
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Medical students, University of Calgary, in clerkship who finished at least 4 weeks of a block of medicine rotation at any hospital site.
  • First year subspecialty or Internal Medicine residents.
  • Practicing physicians in the subspecialties of Internal Medicine or Emergency Medicine.

Exclusion Criteria:

  • Physicians in the subspecialty of Haematology or Respiratory
  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 ClinicalTrials.gov identifier: NCT01752673

Locations
Canada, Alberta
University of Calgary
Calgary, Alberta, Canada, T2V1P9
Sponsors and Collaborators
University of Calgary
Investigators
Principal Investigator: Ghazwan Altabbaa, MD MSc University of Calgary
  More Information

No publications provided

Responsible Party: Ghazwan Altabbaa, Doctor, University of Calgary
ClinicalTrials.gov Identifier: NCT01752673     History of Changes
Other Study ID Numbers: 23231
Study First Received: December 12, 2012
Last Updated: December 14, 2012
Health Authority: Canada: Ethics Review Committee

Keywords provided by University of Calgary:
randomized controlled study

Additional relevant MeSH terms:
Embolism
Pulmonary Embolism
Cardiovascular Diseases
Embolism and Thrombosis
Lung Diseases
Respiratory Tract Diseases
Vascular Diseases

ClinicalTrials.gov processed this record on October 21, 2014