Faculty profile

Braden O’Neill

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Assistant ProfessorClinical Public Health DivisionUniversity of Toronto

Braden O’Neill

Assistant Professor

Clinical Public Health Division

Dalla Lana School of Public Health

University of Toronto

Toronto, Ontario, Canada

Supervision signals

Professors usually supervise graduate students in their department's programs.
31 publications in the last five years, latest in 2026.
Senior (last) author on 9 recent papers, a sign of leading a research group.
Principal investigator on 3 research grants (3 CIHR), most recently in 2022.

These signals come from public records, including CIHR, NSERC and SSHRC funding decisions. Ask the professor or the graduate program whether they are taking new students.

Academic metrics

Publications

Citations

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Collaborators

Grants

Publications by year

Counts cover the works listed on the university profile; citation counts come from Dimensions.

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Signals and details

Research

Mental Health Primary Care Bipolar Patient-Oriented Research Research Priorities Schizophrenia Access Anxiety

Latest papers

Have pulmonary function testing rates recovered post-COVID-19 pandemic? A population-based study.
Respiratory medicine · 2026
Severe Outcomes and Length of Stay Among People With Schizophrenia Hospitalized for COVID-19: A Population-Based Retrospective Cohort Study.
Schizophrenia bulletin · 2026
Trends in pulmonary exercise testing utilization after the COVID-19 pandemic in Ontario: A population-cohort study.
PloS one · 2026

All 42 publications

Latest funding

Developing a conceptual model of a social frailty intervention that addresses the needs of older adults across diverse intersecting identities (sex, gender, and race)
CIHR · 2025 · Co-investigator
$466,651
Identifying optimal primary care models for adults with intellectual and developmental disabilities in Ontario: a mixed methods study
CIHR · 2023 · Co-investigator
$546,976
Primary Care and Severe Mental Illness Research Priorities Blueprint
CIHR · 2022 · Nominated PI
$10,000

All 8 grants and awards

42 publications.

Have pulmonary function testing rates recovered post-COVID-19 pandemic? A population-based study.

Silva-Valencia J, Tu K, Amog K, Moineddin R, Butt DA, Gronsbell J, O'Neill B, Train A, Gershon AS

Respiratory medicine2026

DOI: 10.1016/j.rmed.2026.109029 PMID: 42435914

Severe Outcomes and Length of Stay Among People With Schizophrenia Hospitalized for COVID-19: A Population-Based Retrospective Cohort Study.

Gronsbell J, Wang J, Thurston H, Gao J, Shi Y, Train AD, Butt D, Gershon A, O'Neill B, Tu K

Schizophrenia bulletin2026

DOI: 10.1093/schbul/sbaf066 PMID: 40432348

Trends in pulmonary exercise testing utilization after the COVID-19 pandemic in Ontario: A population-cohort study.

Silva-Valencia J, Tu K, Moineddin R, Butt DA, O'Neill B, Train A, Gronsbell J, Gershon AS

PloS one2026

DOI: 10.1371/journal.pone.0349020 PMID: 42189820

Prescription patterns of inhaler medications from 2017 to 2023: A retrospective study using Ontario administrative healthcare data.

Train A, Vemuri KK, Coderre-Ball A, Silva-Valencia J, Mulligan D, Butt DA, Gronsbell J, O'Neill B, Gershon A, Tu K

PloS one2026

DOI: 10.1371/journal.pone.0348119 PMID: 42268840

Continuous-Time Causal Inference With Marked Point Process Weights: An Example on Sodium-Glucose Co-Transporters 2 Inhibitor Medications and Urinary Tract Infection.

Kalia S, Saarela O, Chen T, O'Neill B, Meaney C, Moineddin R, Aliarzadeh B, Sullivan F, Greiver M

Statistics in medicine2025

DOI: 10.1002/sim.70102 PMID: 40386859

Cancer screening among people with schizophrenia before and after the COVID-19 pandemic in Ontario, Canada: Retrospective cohort study.

O'Neill B, Wang J, Gronsbell J, Butt D, Train A, Ortigoza A, Seaton B, Gershon A, Tu K

General hospital psychiatry2025First author

DOI: 10.1016/j.genhosppsych.2024.10.017 PMID: 39532644

SARS-CoV-2 vaccination for individuals with schizophrenia in Ontario, Canada: A retrospective cohort study.

Ji C, Tu K, Wang J, Butt DA, Gershon AS, Gronsbell J, Train AD, O'Neill B

General hospital psychiatry2025Senior author

DOI: 10.1016/j.genhosppsych.2025.05.009 PMID: 40440784

Healthcare use in individuals with and without attention-deficit/hyperactivity disorder: A population-based longitudinal matched cohort study.

Butt DA, Li Y, Moineddin R, O'Neill B, Train AD, Gronsbell J, Gershon AS, Tu K

PLOS mental health2025

DOI: 10.1371/journal.pmen.0000342 PMID: 41661952

The association between care modality and hospitalizations and emergency department visits for ambulatory care-sensitive conditions during and after the pandemic in Ontario, Canada.

Mohammadrezaei D, Moineddin R, Wang JJ, Valencia JS, Lapadula MC, Ortigoza A, O'Neill B, Gronsbell J, Butt DA, Train A, Gershon AS, Tu K

PloS one2025

DOI: 10.1371/journal.pone.0324805 PMID: 40591636

Randomized controlled trial demonstrates novel tools to assess patient outcomes of Indigenous cultural safety training.

Smylie J, Rotondi MA, Filipenko S, Cox WTL, Smylie D, Ward C, Klopfer K, Lofters AK, O'Neill B, Graham M, Weber L, Damji AN, Devine PG, Collins J, Hardy BJ

BMC medicine2024

DOI: 10.1186/s12916-023-03193-y PMID: 38191406

Profile data last refreshed on July 30, 2025 from the university directory, publication records and CIHR, NSERC and SSHRC funding.

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Braden O’Neill

Research

Latest papers

Latest funding

Have pulmonary function testing rates recovered post-COVID-19 pandemic? A population-based study.

Severe Outcomes and Length of Stay Among People With Schizophrenia Hospitalized for COVID-19: A Population-Based Retrospective Cohort Study.

Trends in pulmonary exercise testing utilization after the COVID-19 pandemic in Ontario: A population-cohort study.

Prescription patterns of inhaler medications from 2017 to 2023: A retrospective study using Ontario administrative healthcare data.

Continuous-Time Causal Inference With Marked Point Process Weights: An Example on Sodium-Glucose Co-Transporters 2 Inhibitor Medications and Urinary Tract Infection.

Cancer screening among people with schizophrenia before and after the COVID-19 pandemic in Ontario, Canada: Retrospective cohort study.

SARS-CoV-2 vaccination for individuals with schizophrenia in Ontario, Canada: A retrospective cohort study.

Healthcare use in individuals with and without attention-deficit/hyperactivity disorder: A population-based longitudinal matched cohort study.

The association between care modality and hospitalizations and emergency department visits for ambulatory care-sensitive conditions during and after the pandemic in Ontario, Canada.

Randomized controlled trial demonstrates novel tools to assess patient outcomes of Indigenous cultural safety training.

Frequent collaborators

Michelle Greiver

Karen Tu

Rahim Moineddin

Jessica Gronsbell

Peter Selby

Frank Sullivan

Catherine Ji

Andrea Gershon

Alexander Singer

Tara Kiran

Osnat Melamed

Martina Kelly

Conrad Pow

Christopher Meaney

Stephanie Montesanti

Paul Kurdyak

Ginetta Salvalaggio

Lee Green

Derelie A Mangin

Kimberlyn McGrail

Jeffrey Bakal

Monika Kastner

Michael Kidd

Patricia O’Brien

Wade Thompson

Olli Saarela

Alexander Zsager

Michael Escobar

Kulamakan Kulasegaram

Melissa Graham

Billie-Jo Hardy

Andrew Pinto

Jayna Holroyd-Leduc

Katie Dainty

Aisha Lofters