Keerat Grewal, University of Toronto

Research

Barriers Cancer Diagnosis Emergency Medicine Health Service Use Patient Outcomes

Latest papers

Risk Factors for Traumatic Intracranial Hemorrhage in Older Adults Sustaining a Head Injury in Ground-Level Falls: A Systematic Review and Meta-analysis
Annals of Emergency Medicine · 2026
Association Between Bariatric Surgery and the Long‐Term Risk for Venous Thromboembolism: A Population‐Based Matched Cohort Study
American Journal of Hematology · 2026
Preemptive Anticoagulation for Patients With Suspected Pulmonary Embolism in the Emergency Department: An International Survey of Emergency Physicians
Academic Emergency Medicine · 2026 · first author

All 39 publications

Latest funding

Early Identification of Kidney Stone Risk in Primary Hyperparathyroidism to Optimize Timely Management; A Mixed Methods Approach
CIHR · 2026 · Co-investigator
$397,800
Deep Vein Thrombosis Testing in the Emergency Department (the DVTest study)
CIHR · 2025 · Co-investigator
$1,472,624
PECAN - Pulmonary Embolism Canada
CIHR · 2024 · Co-investigator
$20,000

All 6 grants and awards

39 publications.

01

Risk Factors for Traumatic Intracranial Hemorrhage in Older Adults Sustaining a Head Injury in Ground-Level Falls: A Systematic Review and Meta-analysis

Dubucs X, Gingras V, Boucher V, Carmichael P-H, Ruel M, De Wit K, Grewal K, Mercier É, Blanchard P-G, Benhamed A

Annals of Emergency Medicine20269 citationsOpen Access

DOI: 10.1016/j.annemergmed.2025.05.021 PMID: W4412561539

02

Association Between Bariatric Surgery and the Long‐Term Risk for Venous Thromboembolism: A Population‐Based Matched Cohort Study

Simard C, Le Gal G, Lazo‐Langner A, Tagalakis V, Grewal K, Nguyen F, Wang T, Siegal DM, Anvari M, Doumouras AG

American Journal of Hematology20262 citations

DOI: 10.1002/ajh.70186

03

Preemptive Anticoagulation for Patients With Suspected Pulmonary Embolism in the Emergency Department: An International Survey of Emergency Physicians

Grewal K, Stubblefield WB, Casey SD, de Wit K, Vinson DR, Thompson C, Hugli O, Thrombosis EAARIBO

Academic Emergency Medicine2026First author

DOI: 10.1111/acem.70297

04

Understanding frailty screening of older adults in the emergency department: A survey of emergency physicians in Ontario.

Bhatnagar P, Melady D, Thompson C, McLeod S, Gray A, Grewal K

Academic emergency medicine : official journal of the Society for Academic Emergency Medicine2026Senior author

DOI: 10.1111/acem.70016 PMID: 40070158

05

Presentation and management of patients with suspected cancer in the emergency department.

Grewal K, Thompson C, Dushenski D, McLeod S

CJEM2026First author

DOI: 10.1007/s43678-025-01071-5 PMID: 41781641

06

Impact of Marginalization Dimensions on Survival Disparities in Epithelial Ovarian Cancer: An Ontario Population-Based Study.

Lim JW, Gien LT, Ante Z, Liu N, Philp L, Grewal K, Bouchard-Fortier G

Cancers2026

DOI: 10.3390/cancers18121892 PMID: 42352427

07

Providing care to domestically sex trafficked persons in the emergency department: a scoping review protocol.

Liu KJ, Kosa SD, Brown H, Grewal K, Du Mont J

BMJ open2026

DOI: 10.1136/bmjopen-2026-118259 PMID: 42009384

08

Emergency Department Use Prior to Cancer Diagnosis and Mortality

Grewal K, Calzavara A, McLeod SL, Eskander A, Savage DW, Thompson C, Borgundvaag B, Ovens H, Cheskes S, de Wit K

JAMA Network Open20254 citationsFirst authorOpen Access

DOI: 10.1001/jamanetworkopen.2025.22585 PMID: W4412570373

09

A retrospective evaluation of access equity in virtual care during the COVID-19 pandemic: A 2-year review and comparison of visits in Ontario, Canada

Mondoux S, Battaglia F, Gayowsky A, Clayton N, Langmann C, Miller P, Pardhan A, Matthews J, Drossos A, Grewal K

PLoS ONE20253 citationsSenior author

DOI: 10.1371/journal.pone.0323303

10

Emergency physicians’ experiences managing patients with a suspected cancer diagnosis in Ontario, Canada: a qualitative study

Moore C, Petrovic B, Bender JL, Thompson C, McLeod SL, Savage D, Borgundvaag B, Ovens H, Irish J, Eskander A

BMJ Open20252 citationsSenior author

DOI: 10.1136/bmjopen-2024-096506

Early Identification of Kidney Stone Risk in Primary Hyperparathyroidism to Optimize Timely Management; A Mixed Methods Approach

Co-investigatorCIHR2026Project Grant

Principal investigators: Eskander, Antoine

Keywords: Access To Care; Equity; Health Disparities; Health Services Research; Kidney Stones; Parathyroidectomy; Primary Hyperparathyroidism; Quality Improvement; Surgical Outcomes; Urinary Calcium Testing

$397,800

Deep Vein Thrombosis Testing in the Emergency Department (the DVTest study)

Co-investigatorCIHR2025Project Grant

Principal investigators: de Wit, Kerstin; Parpia, Sameer

Keywords: Deep Vein Thrombosis; Diagnosis; Emergency Department

$1,472,624

PECAN - Pulmonary Embolism Canada

Co-investigatorCIHR2024Planning and Dissemination Grant - Institute Community Support

Principal investigators: Castellucci, Lana; de Wit, Kerstin; Mendelson, Asher A

Keywords: Pulmonary Embolism

$20,000

Canadian emergency department-oriented pulmonary embolism testing (the CED-OPET study)

Co-investigatorCIHR2023Project Grant

Principal investigators: de Wit, Kerstin

Keywords: Emergency Department; Pulmonary Embolism; Testing

$1,396,125

Understanding cancer care following a new or suspected cancer diagnosis through the emergency department

Nominated PICIHR2022Project Grant

Principal investigators: Grewal, Keerat

Keywords: Barriers; Cancer; Diagnosis; Emergency Medicine; Health Service Use; Patient Outcomes

$206,550

Selective neuroimaging for head-injured emergency patients who take anticoagulant medication.

Co-investigatorCIHR2021Project Grant

Principal investigators: de Wit, Kerstin

Keywords: Diagnosis; Emergency Department; Traumatic Brain Injury

$1,239,300

From CIHR, NSERC and SSHRC funding decisions: CIHR since 2008, NSERC since 1991 and SSHRC since 1998, including their latest published competition results.

Frequent collaborators

Lehana Thabane and Gordon Guyatt: 155 shared papers
Thomas Agoritsas and Gordon Guyatt: 138 shared papers
Kerstin de Wit and Kerstin de Wit: 99 shared papers
Lehana Thabane and Andrew Worster: 49 shared papers
Antoine Eskander and Rinku Sutradhar: 41 shared papers
Shawn Mondoux and Andrew Worster: 22 shared papers
Jonathan Irish and Antoine Eskander: 20 shared papers
Andrew Worster and Kerstin de Wit: 15 shared papers
Gordon Guyatt and Andrew Worster: 13 shared papers
Paul Miller and Shawn Mondoux: 11 shared papers
Kerstin de Wit and Debra Eagles: 11 shared papers
Kerstin de Wit and Debra Eagles: 11 shared papers
Kerstin de Wit and Keerat Grewal: 10 shared papers
Lehana Thabane and Thomas Agoritsas: 9 shared papers
Kerstin de Wit and Keerat Grewal: 9 shared papers
Venkatesh Thiruganasambandamoorthy and Debra Eagles: 9 shared papers
Alim Pardhan and Shawn Mondoux: 7 shared papers
Lehana Thabane and Deborah Siegal: 6 shared papers
Lehana Thabane and Nicole Mittmann: 6 shared papers
Lehana Thabane and Ari Doumouras: 5 shared papers
Gordon Guyatt and Deborah Siegal: 5 shared papers
Andrew Worster and Venkatesh Thiruganasambandamoorthy: 5 shared papers
Kerstin de Wit and Venkatesh Thiruganasambandamoorthy: 5 shared papers
Venkatesh Thiruganasambandamoorthy and Sheldon Cheskes: 5 shared papers
Keerat Grewal and Nicole Mittmann: 5 shared papers
Gordon Guyatt and Nicole Mittmann: 4 shared papers
Alexander Drossos and Paul Miller: 4 shared papers
Alexander Drossos and Alim Pardhan: 4 shared papers
Alexander Drossos and Shawn Mondoux: 4 shared papers
Paul Miller and Alim Pardhan: 4 shared papers
Deborah Siegal and Kerstin de Wit: 4 shared papers
Deborah Siegal and Rinku Sutradhar: 4 shared papers
Monika Krzyzanowska and Antoine Eskander: 4 shared papers
Venkatesh Thiruganasambandamoorthy and Keerat Grewal: 4 shared papers
Rinku Sutradhar and Nicole Mittmann: 4 shared papers
Thomas Agoritsas and Andrew Worster: 3 shared papers
Alexander Drossos and Caillin Langmann: 3 shared papers
Paul Miller and Caillin Langmann: 3 shared papers
Alim Pardhan and Caillin Langmann: 3 shared papers
Kerstin de Wit and Sheldon Cheskes: 3 shared papers
Kerstin de Wit and Alejandro Lazo-Langner: 3 shared papers
Jonathan Irish and Monika Krzyzanowska: 3 shared papers
Monika Krzyzanowska and Rinku Sutradhar: 3 shared papers
Antoine Eskander and Sheldon Cheskes: 3 shared papers
Antoine Eskander and Keerat Grewal: 3 shared papers
Sheldon Cheskes and Keerat Grewal: 3 shared papers
Rinku Sutradhar and Keerat Grewal: 3 shared papers
Lehana Thabane and Keerat Grewal: 2 shared papers
Thomas Agoritsas and Keerat Grewal: 2 shared papers
Gordon Guyatt and Keerat Grewal: 2 shared papers
Ari Doumouras and Deborah Siegal: 2 shared papers
Ari Doumouras and Rinku Sutradhar: 2 shared papers
Alexander Drossos and Keerat Grewal: 2 shared papers
Paul Miller and Keerat Grewal: 2 shared papers
Alim Pardhan and Keerat Grewal: 2 shared papers
Shawn Mondoux and Keerat Grewal: 2 shared papers
Caillin Langmann and Keerat Grewal: 2 shared papers
Andrew Worster and Keerat Grewal: 2 shared papers
Deborah Siegal and Alejandro Lazo-Langner: 2 shared papers
Kerstin de Wit and Jonathan Irish: 2 shared papers
Kerstin de Wit and Karen Li: 2 shared papers
Jonathan Irish and Keerat Grewal: 2 shared papers
Monika Krzyzanowska and Keerat Grewal: 2 shared papers
Kerstin de Wit and Karen Li: 2 shared papers
Kerstin de Wit and Alejandro Lazo-Langner: 2 shared papers
Keerat Grewal and Karen Li: 2 shared papers
Ari Doumouras and Keerat Grewal: 1 shared paper
Deborah Siegal and Keerat Grewal: 1 shared paper
Kerstin de Wit and Axel BENHAMED: 1 shared paper
Jonathan Irish and Axel BENHAMED: 1 shared paper
Antoine Eskander and Axel BENHAMED: 1 shared paper
Keerat Grewal and Debra Eagles: 1 shared paper
Keerat Grewal and Axel BENHAMED: 1 shared paper
Keerat Grewal and Alejandro Lazo-Langner: 1 shared paper

Medicine
Emergency Medicine
Health Research Methods, Evidence, and Impact
Institute of Health Policy, Management, and Evaluation
Psychiatry & Behavioural Neurosciences
Department of Otolaryngology - Head and Neck Surgery
Department of Epidemiology and Biostatistics
Other

1 shared papers, latest 2026

Girish Kulkarni

Toronto General Research Institute

1 shared papers, latest 2016

Write to this professor

A short, specific email works best. This draft uses one of their recent papers; replace the parts in brackets with your own details before sending.

Applying for

Paper to mentionMention their CIHR grant from 2022

Subject: Prospective PhD student: Barriers Dear Professor Grewal, My name is [your name], and I am a [your current degree or role] at [your institution]. I am applying for a PhD position starting in [term and year]. I read your paper "Risk Factors for Traumatic Intracranial Hemorrhage in Older Adults Sustaining a Head Injury in Ground-Level Falls: A Systematic Review and Meta-analysis" (2026), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] I also saw your CIHR-funded project "Understanding cancer care following a new or suspected cancer diagnosis through the emergency department" (2022), and I would be glad to contribute to work in that direction. Are you accepting new PhD students for [term and year]? I have attached my CV and transcripts, and I would be glad to talk at a time that suits you. Thank you for your time. Kind regards, [your name]