Jessica Widdifield, McGill University

Research

Co-Morbidity Epidemiology Rheumatoid Arthritis Rheumatology

Latest papers

Encounters with Rheumatologists in a Publicly-Funded Canadian Healthcare System: A Population-Based Study
Journal of Rheumatology · 2020 · first author
Associations Between Methotrexate Use and the Risk of Cardiovascular Events in Patients with Elderly-onset Rheumatoid Arthritis
Journal of Rheumatology · 2019 · first author
Causes of Death in Rheumatoid Arthritis: How Do They Compare to the General Population?
Arthritis Care and Research · 2018 · first author

All 13 publications

Latest funding

Environmental factors and risk of autoimmune rheumatic disease incidence and serology
CIHR · 2024 · Co-investigator
$502,990
Environmental factors and risk of autoimmune rheumatic disease incidence and serology
CIHR · 2023 · Co-investigator
New statistical methods for population-based studies of time-varying drug exposures: development, validation, and real-world analyses of drug safety and effectiveness
CIHR · 2021 · Co-investigator
$481,950

All 7 grants and awards

13 publications.

01

Encounters with Rheumatologists in a Publicly-Funded Canadian Healthcare System: A Population-Based Study

Widdifield J, Bernatsky S, Pope JE, Ahluwalia V, Barber CEH, Eder L, Kuriya B, Ling V, Paterson JM, Thorne JC

Journal of Rheumatology202016 citationsFirst authorOpen Access

DOI: 10.3899/jrheum.190034 PMID: W2951465486

02

Associations Between Methotrexate Use and the Risk of Cardiovascular Events in Patients with Elderly-onset Rheumatoid Arthritis

Widdifield J, Abrahamowicz M, Paterson JM, Huang A, Thorne JC, Pope JE, Kuriya B, Beauchamp M-E, Bernatsky S

Journal of Rheumatology201938 citationsFirst author

DOI: 10.3899/jrheum.180427

03

Causes of Death in Rheumatoid Arthritis: How Do They Compare to the General Population?

Widdifield J, Paterson JM, Huang A, Bernatsky S

Arthritis Care and Research2018100 citationsFirst author

DOI: 10.1002/acr.23548

04

Patterns of Care Among Patients Referred to Rheumatologists in Ontario, Canada

Widdifield J, Tu K, Thorne JC, Bombardier C, Paterson JM, Jaakkimainen RL, Wing L, Butt DA, Ivers N, Hofstetter C

Arthritis Care and Research201734 citationsFirst author

DOI: 10.1002/acr.22910

05

Primary Care Screening and Comorbidity Management in Rheumatoid Arthritis in Ontario, Canada

Widdifield J, Ivers NM, Bernatsky S, Jaakkimainen L, Bombardier C, Thorne JC, Ahluwalia V, Paterson JM, Young J, Wing L

Arthritis Care and Research201722 citationsFirst author

DOI: 10.1002/acr.23178

06

Model-based methods for case definitions from administrative health data: application to rheumatoid arthritis.

Kroeker K, Widdifield J, Muthukumarana S, Jiang D, Lix LM

BMJ open2017

DOI: 10.1136/bmjopen-2017-016173 PMID: 28645978

07

The Longterm Effect of Early Intensive Treatment of Seniors with Rheumatoid Arthritis: A Comparison of 2 Population-based Cohort Studies on Time to Joint Replacement Surgery

Widdifield J, Moura CS, Wang Y, Abrahamowicz M, Paterson JM, Huang A, Beauchamp M-E, Boire G, Fortin PR, Bessette L

Journal of Rheumatology201617 citationsFirst author

DOI: 10.3899/jrheum.151156

08

Identification of Physician-Diagnosed Alzheimer's Disease and Related Dementias in Population-Based Administrative Data: A Validation Study Using Family Physicians' Electronic Medical Records.

Jaakkimainen RL, Bronskill SE, Tierney MC, Herrmann N, Green D, Young J, Ivers N, Butt D, Widdifield J, Tu K

Journal of Alzheimer's disease : JAD2016

DOI: 10.3233/jad-160105 PMID: 27567819

09

Epidemiology of myasthenia gravis in Ontario, Canada.

Breiner A, Widdifield J, Katzberg HD, Barnett C, Bril V, Tu K

Neuromuscular disorders : NMD2016

DOI: 10.1016/j.nmd.2015.10.009 PMID: 26573434

10

Trends in Excess Mortality Among Patients With Rheumatoid Arthritis in Ontario, Canada

Widdifield J, Bernatsky S, Paterson JM, Tomlinson G, Tu K, Kuriya B, Thorne JC, Pope JE, Hollands S, Bombardier C

Arthritis Care and Research201581 citationsFirst author

DOI: 10.1002/acr.22553

Environmental factors and risk of autoimmune rheumatic disease incidence and serology

Co-investigatorCIHR2024Project Grant

Principal investigators: Bernatsky, Sasha R; Avina-Zubieta, Juan A; Chen, Hong; Smargiassi, Audrey

Keywords: Air Pollution; Autoimmune Rheumatic Disease; Climate Change; Environment; Epidemiology; Health Outcomes; Humidity; Immunity; Musculoskeletal Diseases; Rheumatoid Arthritis

$502,990

Environmental factors and risk of autoimmune rheumatic disease incidence and serology

Co-investigatorCIHR2023Project Grant - Priority Announcement: Health and Climate Change

Principal investigators: Bernatsky, Sasha R; Avina-Zubieta, Juan A; Chen, Hong; Smargiassi, Audrey

Keywords: Air Pollution; Autoimmune Rheumatic Disease; Climate Change; Environment; Epidemiology; Health Outcomes; Humidity; Immunity; Musculoskeletal Diseases; Rheumatoid Arthritis

New statistical methods for population-based studies of time-varying drug exposures: development, validation, and real-world analyses of drug safety and effectiveness

Co-investigatorCIHR2021Project Grant

Principal investigators: Abrahamowicz, Michal M

Keywords: Absolute Risks; Biostatistics; Cumulative Effects; Drug Safety And Effectiveness; Exposure Measurement Errors; New Methods; Pharmacoepidemiology; Simulations; Time-Varying Exposures; Unmeasured Confounding

$481,950

Enhancing CAN-AIM capacity to respond to drug safety and effectiveness queries

Co-investigatorCIHR2019DSEN team grants: MAGIC and CAN-AIM

Principal investigators: Bernatsky, Sasha R; Abrahamowicz, Michal M; Afif, Waqqas; Awadalla, Philip; Bérard, Anick; Buckeridge, David L; Hazlewood, Glen S; Hohl, Corinne M; Kowalec, Kaarina A; Moride, Yola; Moura, Cristiano S; Pilote, Louise; Tremlett, Helen L

Keywords: Comparative Effectiveness And Safety; Confounding Bias; Exposure Measurement Errors; Pharmacoepidemiology; Prospective Studies; Statistical Modelling

$2,550,000

Air pollution and systemic autoimmune rheumatic diseases

Co-investigatorCIHR2018Project Grant

Principal investigators: Bernatsky, Sasha R; Smargiassi, Audrey

Keywords: Air Pollution; Arthritis; Epidemiology; Health Outcomes; Rheumatoid Arthritis; Rheumatology; Systemic Autoimmune Rheumatic Diseases

$772,650

Comparative Effectiveness and Safety of Biosimilar and Legacy Drugs

Co-investigatorCIHR2017Rapid Funding for DSEN Targeted Research

Principal investigators: Bernatsky, Sasha R; Boire, Gilles; Bykerk, Vivian P; Lakatos, Peter; Maksymowych, Walter P; Moura, Cristiano S; Targownik, Laura E

Keywords: Des

$1,769,650

Optimizing the use of administrative health databases for rheumatic disease research

Principal investigatorCIHR2015Planning and Dissemination Grant - Institute Community Support

Principal investigators: Bernatsky, Sasha R; Widdifield, Jessica

Keywords: Co-Morbidity; Epidemiology; Rheumatoid Arthritis; Rheumatology

$10,000

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

Sasha Bernatsky and Sasha Bernatsky: 313 shared papers
Noah Ivers and Noah Ivers: 140 shared papers
Evelyne Vinet and Evelyne Vinet: 45 shared papers
Sasha Bernatsky and Evelyne Vinet: 35 shared papers
Sasha Bernatsky and Evelyne Vinet: 31 shared papers
Evelyne Vinet and Sasha Bernatsky: 31 shared papers
Sasha Bernatsky and Evelyne Vinet: 31 shared papers
Michal Abrahamowicz and Sasha Bernatsky: 30 shared papers
Sasha Bernatsky and Jessica Widdifield: 28 shared papers
Michal Abrahamowicz and Sasha Bernatsky: 27 shared papers
Sasha Bernatsky and Jessica Widdifield: 26 shared papers
J Michael Paterson and Jessica Widdifield: 22 shared papers
Jessica Widdifield and Lihi Eder: 21 shared papers
Karen Tu and Jessica Widdifield: 19 shared papers
J Michael Paterson and Karen Tu: 17 shared papers
J Michael Paterson and Claire Bombardier: 16 shared papers
Claire Bombardier and George Tomlinson: 15 shared papers
Claire Bombardier and Jessica Widdifield: 13 shared papers
Sasha Bernatsky and Lihi Eder: 11 shared papers
Sasha Bernatsky and Sasha Bernatsky: 11 shared papers
Sasha Bernatsky and Jessica Widdifield: 10 shared papers
Sasha Bernatsky and Lihi Eder: 10 shared papers
Sasha Bernatsky and Sasha Bernatsky: 10 shared papers
Jessica Widdifield and Jessica Widdifield: 10 shared papers
Sasha Bernatsky and Karen Tu: 9 shared papers
Sasha Bernatsky and Jessica Widdifield: 9 shared papers
Karen Tu and Noah Ivers: 8 shared papers
Karen Tu and Noah Ivers: 8 shared papers
J Michael Paterson and Jessica Widdifield: 7 shared papers
J Michael Paterson and Noah Ivers: 6 shared papers
J Michael Paterson and Noah Ivers: 6 shared papers
Michal Abrahamowicz and Jessica Widdifield: 6 shared papers
J Michael Paterson and George Tomlinson: 5 shared papers
Claire Bombardier and Jessica Widdifield: 5 shared papers
Karen Tu and Jessica Widdifield: 5 shared papers
Claire Bombardier and Vandana Ahluwalia: 3 shared papers
Michal Abrahamowicz and Gilles Boire: 3 shared papers
Jessica Widdifield and Vandana Ahluwalia: 3 shared papers
J Michael Paterson and Vandana Ahluwalia: 2 shared papers
Michal Abrahamowicz and Jessica Widdifield: 2 shared papers
Karen Tu and George Tomlinson: 2 shared papers
Evelyne Vinet and Sasha Bernatsky: 2 shared papers
Noah Ivers and Jessica Widdifield: 2 shared papers
Jessica Widdifield and Noah Ivers: 2 shared papers
J Michael Paterson and Debbie Feldman: 1 shared paper
J Michael Paterson and Gilles Boire: 1 shared paper
J Michael Paterson and Jessica Widdifield: 1 shared paper
Nathan Herrmann and Karen Tu: 1 shared paper
Nathan Herrmann and Noah Ivers: 1 shared paper
Nathan Herrmann and Jessica Widdifield: 1 shared paper
Claire Bombardier and Debbie Feldman: 1 shared paper
Claire Bombardier and Gilles Boire: 1 shared paper
Michal Abrahamowicz and Debbie Feldman: 1 shared paper
Sasha Bernatsky and Jessica Widdifield: 1 shared paper
Evelyne Vinet and Jessica Widdifield: 1 shared paper
Sasha Bernatsky and Jessica Widdifield: 1 shared paper
Jessica Widdifield and Debbie Feldman: 1 shared paper
Jessica Widdifield and George Tomlinson: 1 shared paper
Jessica Widdifield and Depeng Jiang: 1 shared paper
Jessica Widdifield and Gilles Boire: 1 shared paper
Jessica Widdifield and Lihi Eder: 1 shared paper
Jessica Widdifield and Jessica Widdifield: 1 shared paper
Jessica Widdifield and Evelyne Vinet: 1 shared paper
Jessica Widdifield and Vandana Ahluwalia: 1 shared paper
Jessica Widdifield and Sasha Bernatsky: 1 shared paper
Jessica Widdifield and Depeng Jiang: 1 shared paper

Medicine
Institute of Health Policy, Management, and Evaluation
Family Medicine
Toronto General Research Institute
Family and Community Medicine
Clinical Epidemiology
Pediatrics
Other

1 shared papers, latest 2016

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Subject: Prospective PhD student: Co-Morbidity Dear Professor Widdifield, 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 "Encounters with Rheumatologists in a Publicly-Funded Canadian Healthcare System: A Population-Based Study" (2020), and it connects closely to my own work on [your research topic]. [One or two sentences on what you did and what you learned.] 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]