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Christopher Ma

university of calgary

11H-index
77Paper Count
456Citation Count
Published Papers 269
Publication Date
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MALIGNANCY RISK ASSOCIATED WITH UPADACITINIB IN IMMUNE-MEDIATED INFLAMMATORY DISEASES: A COMPARISON WITH U.S. AND GLOBAL CANCER REGISTRIES
errClinical Gastroenterology and Hepatology
IF12
err2026-07-20
err0
errOAAI
errIlaria Faggiani; Ashley N. Clarke; Igor Stukalin; Silvio Danese; Remo Panaccione; Christopher Ma
errShare
errSave
EFFECTIVENESS OF RISANKIZUMAB AFTER USTEKINUMAB FAILURE IN CROHN’S DISEASE: A MULTICENTER RETROSPECTIVE COHORT STUDY
errGastroenterology
IF25.1
err2026-05-08
err0
PREAI
errShiva Mehta-Dhand; Nima Hamidi; Ashley N. Clarke; Frank Hoentjen; Remo Panaccione; Christopher Ma
errShare
errSave
Time to rethink washout periods in inflammatory bowel disease clinical trials: an international Delphi consensus
errJournal of Crohn's and Colitis
IF8.7
err2026-05-01
err0
PREAI
errPauline Wils; Vipul Jairath; Bruce E Sands; Axel Dignass; Fernando Magro; David T Rubin; Iris Dotan; Walter Reinisch; Parambir Dulai; Richard Gearry; Christopher Ma; Millie Long; Alessandro Armuzzi; Taku Kobayashi; Dan Turner; Sophie Vieujean; Bram Verstockt; Ailsa Hart; Silvio Danese; Laurent Peyrin-Biroulet
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errSave
Comparative Safety of Advanced Therapies in Patients With Ulcerative Colitis: An Administrative Claims-Based Study
errAmerican Journal of Gastroenterology
IF7.6
err2026-05-01
err2
PREAI
errAhuja, Dhruv; Dziegielewski, Claudia; Yeh, Kuan-Hung; Patel, Sagar B.; Goodwin, Shane W.; Ma, Christopher; Ananthakrishnan, Ashwin N.; Singh, Namrata; Jairath, Vipul; Xu, Ronghui; Singh, Siddharth
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Increased failure of budesonide MMX for ulcerative colitis during the COVID-19 pandemic: a population-based study
errTherapeutic Advances in Gastroenterology
IF3.4
err2026-03-30
err0
errOAAI
errStephanie Coward; Karen J. B. Martins; Scott Klarenbach; Lawrence P. Richer; Christopher Ma; Remo Panaccione; Cynthia H. Seow; Karen Kroeker; Frank Hoentjen; Laura E. Targownik; Gilaad G. Kaplan
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errSave
Effectiveness and Safety of Advanced Combination Treatment in Patients With Refractory Inflammatory Bowel Disease or Concomitant Immune-Mediated Disease or Extraintestinal Manifestations: A Multicenter Canadian Study
errAmerican Journal of Gastroenterology
IF7.6
err2026-02-01
err3
PREAI
errSolitano, Virginia; Ogunsakin, Ropo Ebenezer; Yuan, Yuhong; Bernstein, Charles N.; Bessissow, Talat; Bressler, Brian; Hoentjen, Frank; Van Lierop, Lisa; Leung, Yvette; Ma, Christopher; Marshall, John Kenneth; Narula, Neeraj; Alahmari, Mohammed; Mccurdy, Jeffrey D.; Murthy, Sanjay; Panaccione, Remo; Rosenfeld, Greg; Milgrom, Raquel; Silverberg, Mark; Jairath, Vipul
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errSave
Disease burden, diagnosis pathways and treatment patterns in patients with eosinophilic esophagitis: a real-world study
errEUROPEAN JOURNAL OF GASTROENTEROLOGY & HEPATOLOGY
IF1.8
err2026-02-01
err0
PREAI
errMa, Christopher; von Arm, Ulrike; Zerbib, Frank; Pela, Tiffany; Radwan, Amr; Jacob-Nara, Juby A.; Parikh, Rohan C.; Borsos, Kinga; Bello, Fareedat; Thomas, Ryan B.; Tilton, Sarette T.
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errSave
Temporal trends in depression-related hospitalizations and suicide among patients with inflammatory bowel disease
errJournal of the Canadian Association of Gastroenterology
IF2.7
err2026-01-01
err0
PREAI
errMarkovinovic, Ante; Ma, Christopher; Shaheen, Abdel-Aziz; Coward, Stephanie; Kaplan, Gilaad G.
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errSave
Meta-Analysis: Prevalence of Eating Disorders in Inflammatory Bowel Disease
errALIMENTARY PHARMACOLOGY & THERAPEUTICS
IF6.7
err2025-12-01
err0
errOAAI
errGoddard, Quinn; Markovinovic, Ante; Ronksley, Paul E.; Seow, Cynthia; Ma, Christopher; Shaheen, Abdel-Aziz; Kaplan, Gilaad G.
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errSave
Higher BMI Does Not Impair Visualization of Bowel Segments or Anastomoses in Point-of-Care Intestinal Ultrasound
errAMERICAN JOURNAL OF GASTROENTEROLOGY
IF7.6
err2025-12-01
err0
PREAI
errMaracle, Brooke; Hazra, Deepan; Novak, Kerri; Lu, Cathy; Besney, Jonathan; Reji, Rohita; Al Darwish, Alia; Kaplan, Gilaad; Seow, Cynthia; Ingram, Richard; Ma, Christopher; Panaccione, Remo; St-Pierre, Joelle
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errSave
Efficacy of IL-12/23 and IL-23 Antagonists for Moderate to Severe Crohn's Disease in Advanced Treatment Failure Populations: A Network Meta-Analysis
errAMERICAN JOURNAL OF GASTROENTEROLOGY
IF7.6
err2025-12-01
err0
PREAI
errMa, Christopher; Dubinsky, Marla C.; Melmed, Gil; Joshi, Namita; Griffith, Jenny; Aponte, Fernando; Kim, Brooke; Collins, Eric; Westerhoff, Kristen; Panaccione, Remo
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errSave
Predicting Inflammation in Crohn's Disease Small Bowel Strictures
errAMERICAN JOURNAL OF GASTROENTEROLOGY
IF7.6
err2025-12-01
err0
PREAI
errGulhati, Vishrut; Rosentreter, Ryan; O'brien, Maureen; Hoque, Sami; Ingram, Richard; Kaplan, Gilaad; Ma, Christopher; Seow, Cynthia; St-Pierre, Joelle; Novak, Kerri; Panaccione, Remo; Lu, Cathy
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errSave
Correlating IBDQ to EQ-5D Utility Scores in Risankizumab Phase 3 Ulcerative Colitis Clinical Trials
errAMERICAN JOURNAL OF GASTROENTEROLOGY
IF7.6
err2025-12-01
err0
PREAI
errMa, Christopher; Siffledeen, Jesse; Lakatos, Peter; Aderian, Sandrine Sarine; Karagiannis, Thomas; George, Marina; O'hara, Jennifer R.; Panaccione, Remo
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errSave
Recommendations for the diagnosis and management of eosinophilic esophagitis in adults and children in Canada: a Delphi consensus project
errAllergy, Asthma & Clinical Immunology
IF0
err2025-11-09
err0
errOAAI
errVishal Avinashi; Milli Gupta; Beth A. Payne; Haneen Amhaz; Alisha T. Temirova; Waqqas Afif; Dhandapani Ashok; Janice Barkey; David Burnett; Jonathan W. Bush; Scott Cameron; Stuart Carr; Dina El Demellawy; Stephanie Erdle; Hien Q. Huynh; Jennifer Griffin; Samir C. Grover; Kelly Grzywacz; Samira Jeimy; Hin Hin Ko; Gina Lacuesta; Margaret Marcon; Serge Mayrand; Harrison Petropolis; David Rodrigues; Mary Sherlock; Christine Song; Natacha Tardio; Timothy K. Vander Leek; Meagan Vurzinger; Brock A. Williams; Ted Xenodemetropoulos; Christopher Ma; Edmond S. Chan
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errSave
Meta-Analysis: Improvement of Bowel Urgency With Advanced Therapies for Inflammatory Bowel Disease
errAlimentary Pharmacology & Therapeutics
IF6.7
err2025-11-04
err0
PREAI
errPurab Patel; Peter Belesiotis; Nitin Shiv Rai; Yuhong Yuan; Neeraj Narula; Christopher Ma; Maria Cino; Alexa Sasson; Vipul Jairath; Parul Tandon
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errSave
Recommendations for the diagnosis and management of eosinophilic esophagitis in adults and children in Canada: a Delphi consensus project
errJOURNAL OF THE CANADIAN ASSOCIATION OF GASTROENTEROLOGY
IF2.7
err2025-11-01
err0
PREAI
errAvinashi, Vishal; Gupta, Milli; Payne, Beth A.; Amhaz, Haneen; Temirova, Alisha T.; Afif, Waqqas; Ashok, Dhandapani; Barkey, Janice; Burnett, David; Bush, Jonathan W.; Cameron, Scott; Carr, Stuart; El Demellawy, Dina; Erdle, Stephanie; Huynh, Hien Q.; Griffin, Jennifer; Grover, Samir C.; Grzywacz, Kelly; Jeimy, Samira; Ko, Hin Hin; Lacuesta, Gina; Marcon, Margaret; Mayrand, Serge; Petropolis, Harrison; Rodrigues, David; Sherlock, Mary; Song, Christine; Tardio, Natacha; Vander Leek, Timothy K.; Vurzinger, Meagan; Williams, Brock; Xenodemetroupolous, Ted; Ma, Christopher; Chan, Edmond S.
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errSave
Review article: Seeing Is Believing-The Eosinophilic Oesophagitis Endoscopic Reference Score Can Serve as a Valuable Clinical Trial Endpoint in Eosinophilic Oesophagitis
errALIMENTARY PHARMACOLOGY & THERAPEUTICS
IF6.7
err2025-11-01
err0
PREAI
errHirano, Ikuo; Furuta, Glenn T.; Falk, Gary W.; Ma, Christoper; Gonsalve, Nirmala; Dellon, Evan S.
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errSave
An international consensus on the design of clinical trials for advanced combination treatment (ACT) in inflammatory bowel disease
erreClinicalMedicine
IF10
err2025-10-23
err0
errOAAI
errVirginia Solitano; Jurij Hanžel; Christopher Ma; Robert Battat; Tim Raine; Britta Siegmund; Laurent Peyrin-Biroulet; Bram Verstockt; Joana Torres; Saurabh Mehandru; Geert D'Haens; Malcolm Hogan; Federica Ungaro; Raja Atreya; Julian Panés; Remo Panaccione; Claire E. Parker; Bruce E. Sands; Brian G. Feagan; Silvio Danese; Vipul Jairath
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errSave
Overall and Comparative Risk of Shingles With Advanced Therapies in Patients With Inflammatory Bowel Diseases
errAlimentary Pharmacology & Therapeutics
IF6.7
err2025-10-15
err0
PREAI
errDhruv Ahuja; Soo-Kyung Park; Kuan-Hung Yeh; Sagar B. Patel; Shane W. Goodwin; Christopher Ma; Namrata Singh; Ashwin N. Ananthakrishnan; Vipul Jairath; Ronghui Xu; Siddharth Singh
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Adalimumab around the world: comparative analysis of products characteristics and patient support systems
errTherapeutic Advances in Gastroenterology
IF3.4
err2025-10-05
err0
errOAAI
errTsz Hong Yiu; Emilia Anderson; Wai Keung Leung; Hiroshi Nakase; Rupa Banerjee; Huiyu Lin; Christopher Ma; Fernando Magro; Stacy Tse; Bruce E. Sands; Christian Selinger; Rupert W. Leong
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Research Directions

No research directions
Co-authors
Cooperation Journals
王
王振林 (Zhong Lin Wang)
H-index: 320 · Papers: 3.9K
W
William J. Sandborn
H-index: 199 · Papers: 2.1K
M
M. Hassan Murad
H-index: 184 · Papers: 1.4K
S
Séverine Vermeire
H-index: 163 · Papers: 2.4K
R
Rohit Loomba
H-index: 154 · Papers: 1.3K
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