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Clinical decision rules

If you’ve ever been treated in an emergency department anywhere in the world, chances are your health-care provider used a clinical decision rule developed at The Ottawa Hospital to help diagnose you. Researchers at The Ottawa Hospital and the University of Ottawa are world leaders in developing clinical decision rules that streamline diagnosis, reduce wait times and limit unnecessary diagnostic tests. In fact, three of the top five rules recommended for U.S. emergency departments were developed in Ottawa. Clinical decision rules developed in Ottawa are listed below.

Some of these rules are available to clinicians on The Ottawa Rules app.

Thrombosis (blood clot) rules

The Ottawa Score for the Risk of Recurrent Venous Thromboembolism in Cancer Patients

Wells’ Rule for Deep Vein Thrombosis

Wells’ Rule for Pulmonary Embolism 

HERDOO2 Rule to guide duration of anticoagulation in women with unprovoked venous thromboembolism

Emergency Medicine Rules

Imaging decision rules

Canadian C-Spine Rule

Canadian CT Head Rule

The Ottawa Ankle Rules

The Ottawa Knee Rule

Risk scales

Canadian Syncope Risk Score

Canadian Transient Ischemic Attack (TIA) Score

Ottawa Chest Pain Cardiac Monitoring Rule

Ottawa COPD Risk Scale

Ottawa Heart Failure Risk Scale

Ottawa Subarachnoid Hemorrhage Rule

Research News


When is fainting a sign of a bigger problem? This tool can tell
May 14, 2020 - Most of the time fainting is harmless, but for some people it can be caused by serious conditions like irregular heartbeat. A made-in-Ottawa tool can accurately tell emergency physicians which patients will have symptoms of these serious conditions
Updated Ottawa Rules app could help doctors predict strokes, catch deadly brain bleeds
May 14, 2020 - A free app for emergency department physicians based on Ottawa’s world-renowned clinical decision rules has added more rules to its roster.
Ottawa doctor recognized as one of the top blood vessel researchers in Canada
January 23, 2020 - Dr. Philip Wells has received a major honour recognizing his outstanding contributions to advancing care in blood and blood vessel sciences both in Canada and around the world.
Show more news stories


Researchers


Name Scientific appointment Diseases, conditions and populations of interest Research and clinical approaches
Breau, Rodney
MD
Scientist
(Clinical Epidemiology)
Cancer, Kidney disease, Prostate cancer Clinical decision rules, Clinical research, Clinical trials, Cohort studies, Imaging, Patient decision aids, Patient engagement, Quality Improvement, Surgery, Systematic reviews, Transfusions
Klein, Ran
PhD
Clinician Investigator
(Clinical Epidemiology)
Cancer, Heart disease, Vascular, heart and metabolic disease Artificial intelligence and data science, Basic research, Biomarkers, Clinical decision rules, Health technology, Imaging
Le Gal, Gregoire
MD, PhD
Senior Scientist
(Clinical Epidemiology)
Thrombosis / thromboembolism Clinical decision rules, Clinical research, Clinical trials, Epidemiology, Patient engagement, Peri-operative medicine
Murthy, Sanjay
MD, FRCPC
Associate Scientist
(Clinical Epidemiology)
Colorectal cancer, Crohn's, Gastrointestinal disease, Inflammatory bowel syndrome Clinical decision rules, Clinical research, Cohort studies, Epidemiology, Health economics, Health services research
Perry, Jeffrey
MD, MSc, CCFP-EM
Senior Scientist
(Clinical Epidemiology)
Stroke, Subarachnoid hemorrhage Clinical decision rules, Emergency medicine
Ramsay, Timothy
PhD
Senior Scientist
(Clinical Epidemiology)
Addiction, Alzheimer's, Amyotrophic lateral sclerosis, Anxiety, Ataxia, Attention deficit hyperactivity disorder (ADHD), Autism, Bipolar, Brain and neuromuscular disease, Chronic obstructive pulmonary disease, Colorectal cancer, Concussion, Cystic fibrosis, Dementia, Depression, Dystonia, First Nations, Inuit and Métis Health, HIV, Immigrant and refugee health, Influenza, Kidney disease, Lung cancer, Macular degeneration, Men's health, Multiple sclerosis, Muscular dystrophy, Myasthenia gravis, Obesity, Ovarian cancer, Parkinson's, Pulmonary hypertension, Septic shock, Spinal cord injury Behaviour, Biomaterials, Biostatistics, Cell therapy, Clinical decision rules, Clinical research, Clinical trials, Cohort studies, Critical care, Drug development, Emergency medicine, Epidemiology, Health professional behaviour change, Health promotion, Health research methods, Health services research, Health technology, Immunization, Immunotherapy, Palliative care, Patient decision aids, Pharmacology, Pharmacy, Prevention, Psychology, Psychometrics, Public health, Qualitative methods, Quality Improvement, Regenerative medicine, Rehabilitation, Risk assessment, Shared decision making, Surgery, Surveys, Systematic reviews, Transfusions, Translational research, Transplantation, Viral therapy
Rodger, Marc
MD
Affiliate Investigator
(Clinical Epidemiology)
Pregnancy, Thrombosis / thromboembolism, Women's health Clinical decision rules, Clinical research, Clinical trials, Cohort studies, Epidemiology, Systematic reviews
Santos, Marlise
MD (FRCPC), MSc, MPH
Clinician Investigator
(Clinical Epidemiology)
Alzheimer's, Anxiety, Ataxia, Autoimmune disease, Autoimmune diseases of the nervous system, Blood cancer, Brain and neuromuscular disease, Brain cancer, Cancer, Chronic disease, Concussion, Dementia, Depression, Global health, Head and neck cancer, Health equity, Health in disadvantaged peoples, Infectious disease, Intellectual disabilities, Multiple sclerosis, Parkinson's, Population health, Sickle cell anemia, Spinal cord injury, Stroke, Subarachnoid hemorrhage, Thrombosis / thromboembolism, Traumatic brain injury, Traumatic injuries, Vascular cognitive impairment, Vascular, heart and metabolic disease Artificial intelligence and data science, Basic research, Behaviour, Biostatistics, Cancer biotherapeutics, Clinical decision rules, Clinical research, Clinical trials, Cohort studies, Critical care, Epidemiology, Health economics, Health research methods, Health services research, Health technology, Imaging, Patient safety, Pragmatic trials, Prevention, Public health, Qualitative methods, Quality Improvement, Shared decision making, Surgery, Surveys, Systematic reviews
Stiell, Ian
MD, MSc, FRCPC
Senior Scientist
(Clinical Epidemiology)
Chronic obstructive pulmonary disease, Heart disease Clinical decision rules, Clinical trials, Emergency medicine
Taljaard, Monica
PhD
Senior Scientist
(Clinical Epidemiology)
Biostatistics, Clinical decision rules, Clinical trials, Cluster randomized trials, Cohort studies, Epidemiology, Health professional behaviour change, Health research methods, Health services research, Knowledge translation and implementation research, Patient engagement, Quality Improvement
Thiruganasambandamoorthy, Venkatesh
MBBS, CCFP-EM, MSc
Senior Scientist
(Clinical Epidemiology)
Cardiac arrest, COVID-19, Heart disease, Vascular, heart and metabolic disease Artificial intelligence and data science, Clinical decision rules, Clinical research, Emergency medicine, Epidemiology, Health services research
Vaillancourt, Christian
MD, MSc, FRCPC, CSPQ
Senior Scientist
(Clinical Epidemiology)
Cardiac arrest, Heart disease, Population health, Spinal cord injury, Traumatic brain injury, Traumatic injuries Clinical decision rules, Clinical research, Clinical trials, Cluster randomized trials, Cohort studies, Critical care, Emergency medicine, Epidemiology, Health economics, Health professional behaviour change, Health services research, Knowledge translation and implementation research, Public health, Quality Improvement, Surveys, Systematic reviews