🏆 Finalist — NIH Data Sharing Index (“S-Index”) Challenge

Christopher Ma

University of Calgary

ORCID: 0000-0002-4698-9948
Biochemistry, Genetics and Molecular BiologyNeuroscience

Pilot corpus only

This score is computed over theSindex pilot corpus and does not cover the full scientific literature. Scores are relative to papers we have ingested — papers, authors, and institutions outside the pilot are not represented. Methodology.

Top 2%percentile
4.5Author DataRank

Indexed papers

2in pilot corpus
datarank_citation_only_1hop_v6· scope data_onlyMethodology
Why this DataRank?

An author's DataRank is the sum of the DataRanks of all 2 indexed papers attributed to them. A prolific author with many moderate-impact papers can outrank one with a single high-impact paper.

Author scores recompute whenever paper DataRanks are refreshed, so this number lags the underlying paper scores by at most one batch run.

Read the full methodology →

Top data-sharing exemplar

The highest-impact dataset this researcher has shared, ranked by DataRank — the single contribution doing the most to lift their data-sharing standing.

Trends in U.S. Health Care Spending on Inflammatory Bowel Diseases, 1996-2016

Inflammatory Bowel Diseases(2021)10.1093/ibd/izab074
Top 7%
3.1DataRank
Top 7%77 citations

Alexander S. Qian, Nghia Nguyen, Stephanie K.M. Ho, Jiyu Luo, Vipul Jairath +3 more

Papers

Driven by 18 papers — median percentile 89. Top paper: “Trends in U.S. Health Care Spending on Inflammatory Bowel Diseases, 1996-2016”.

Trends in U.S. Health Care Spending on Inflammatory Bowel Diseases, 1996-2016

Inflammatory Bowel Diseases(2021)10.1093/ibd/izab074
Top 7%
3.1DataRank
Top 7%77 citations

Alexander S. Qian, Nghia Nguyen, Stephanie K.M. Ho, Jiyu Luo, Vipul Jairath +3 more

Incorporating Fecal Calprotectin Into Clinical Practice for Patients With Moderate-to-Severely Active Ulcerative Colitis Treated With Biologics or Small-Molecule Inhibitors

The American Journal of Gastroenterology(2020)10.14309/ajg.0000000000000596
Top 15%
1.4DataRank
Top 15%27 citations

Robert Battat, Maria Barsky, Nghia Nguyen, Christopher Ma, Neeraj Narula +11 more

Comparative efficacy and safety of biologic therapies for moderate-to-severe Crohn's disease: a systematic review and network meta-analysis

˜The œLancet. Gastroenterology & hepatology(2021)10.1016/s2468-1253(21)00312-5
N/A
0DataRank · unranked
298 citations

Mohammad Hassan Murad, Mathurin Fuméry, Rocío Sedaño, Vipul Jairath, Remo Panaccione +3 more

Epidemiology and Natural History of Perianal Crohn’s Disease: A Systematic Review and Meta-Analysis of Population-Based Cohorts

Inflammatory Bowel Diseases(2021)10.1093/ibd/izab287
N/A
0DataRank · unranked
142 citations

Jeffrey D. McCurdy, Christopher Ma, Vipul Jairath, Siddharth Singh, Lester Tsai

Disease Activity Indices for Pouchitis: A Systematic Review

Inflammatory Bowel Diseases(2021)10.1093/ibd/izab124
N/A
0DataRank · unranked
31 citations

Tran M Nguyen, Ahmed Almradi, Florian Rieder, Claire E. Parker, Lisa M. Shackelton +6 more

A Summary of the Meetings of the Development of a Core Outcome Set for Therapeutic Studies in Eosinophilic Esophagitis (COREOS) International Multidisciplinary Consensus

Gastroenterology(2021)10.1053/j.gastro.2021.04.081
N/A
0DataRank · unranked
2 citations

Alain Schoepfer, Ekaterina Safroneeva, Evan S. Dellon, Albert J. Bredenoord, Mirna Chehade +67 more

Comparative Risk of Serious Infections With Biologic Agents and Oral Small Molecules in Inflammatory Bowel Diseases: A Systematic Review and Meta-Analysis

Clinical Gastroenterology and Hepatology(2022)10.1016/j.cgh.2022.07.032
N/A
0DataRank · unranked
106 citations

Antonio Facciorusso, Tine Jess, Christopher Ma, Cesare Hassan, Alessandro Repici +4 more

Proactive Therapeutic Drug Monitoring Versus Conventional Management for Inflammatory Bowel Diseases: A Systematic Review and Meta-Analysis

Gastroenterology(2022)10.1053/j.gastro.2022.06.052
N/A
0DataRank · unranked
69 citations

Virginia Solitano, Sudheer K. Vuyyuru, John K MacDonald, Silje Watterdal Syversen, Kristin Kaasen Jørgensen +5 more

Reliability and responsiveness of endoscopic disease activity assessment in eosinophilic esophagitis

Gastrointestinal Endoscopy(2022)10.1016/j.gie.2022.01.014
N/A
0DataRank · unranked
49 citations

Albert J. Bredenoord, Evan S. Dellon, Jeffrey A. Alexander, Luc Biedermann, Malcolm Hogan +22 more

Withdrawal of Immunomodulators or TNF Antagonists in Patients With Inflammatory Bowel Diseases in Remission on Combination Therapy: A Systematic Review and Meta-analysis

Clinical Gastroenterology and Hepatology(2023)10.1016/j.cgh.2023.08.039
N/A
0DataRank · unranked
23 citations

Virginia Solitano, D. Brent Polk, Tran M Nguyen, Christopher Ma, Gaurav Syal +7 more

Characteristics of Interventional Trials for Patients Living With Intestinal Stoma Registered in ClinicalTrials.gov With a Focus on Inflammatory Bowel Disease

Inflammatory Bowel Diseases(2023)10.1093/ibd/izad293
N/A
0DataRank · unranked
4 citations

Christopher Ma, Tanmay Sharma, Tran M Nguyen, Talat Bessissow, Neeraj Narula +4 more

Reliability of MR Enterography Features for Describing Fibrostenosing Crohn Disease

Radiology(2024)10.1148/radiol.233039
N/A
0DataRank · unranked
21 citations

Mark E. Baker, David H. Bruining, Jeff L. Fidler, Eric C. Ehman, Shannon P. Sheedy +24 more

Reliability of CT Enterography for Describing Fibrostenosing Crohn Disease

Radiology(2024)10.1148/radiol.233038
N/A
0DataRank · unranked
18 citations

Christopher Ma, Jurij Hanžel, Joel G. Fletcher, Mark E. Baker, Zhongya Wang +15 more

No Impact of Concomitant Medications on Efficacy and Safety of Biologics and Small Molecules for Ulcerative Colitis

Clinical Gastroenterology and Hepatology(2024)10.1016/j.cgh.2024.08.040
N/A
0DataRank · unranked
4 citations

Guangyong Zou, Virginia Solitano, Gaurav Syal, Han Hee Lee, Christopher Ma +3 more

Reply

Gastroenterology(2024)10.1053/j.gastro.2024.02.010
N/A
0DataRank · unranked
0 citations

Christopher Ma, Joseph A. Murray, Benjamin Lebwohl

Contemporary Risk of Surgery in Patients With Ulcerative Colitis and Crohn’s Disease: A Meta-Analysis of Population-Based Cohorts

Clinical Gastroenterology and Hepatology(2020)10.1016/j.cgh.2020.10.039
N/A
0DataRank · unranked
312 citations

Christopher Ma, Parambir S. Dulai, Larry J. Prokop, Samuel Eisenstein, Sonia Ramamoorthy +5 more

Incidence and Prevalence of Inflammatory Bowel Diseases in Hispanic Individuals in the United States, 2011–2020

Clinical Gastroenterology and Hepatology(2025)10.1016/j.cgh.2025.08.008
N/A
0DataRank · unranked
0 citations

Colleen Brensinger, Virginia Pate, Gilaad G. Kaplan, Michael D. Kappelman, James D. Lewis +4 more

Combination Therapy Does Not Improve Rate of Clinical or Endoscopic Remission in Patients with Inflammatory Bowel Diseases Treated With Vedolizumab or Ustekinumab

Clinical Gastroenterology and Hepatology(2020)10.1016/j.cgh.2020.07.012
N/A
0DataRank · unranked
88 citations

Paulo Gustavo Kotze, Alice Burgevin, Willam Tan, Alison T. Jess, Pei-Shun Li +7 more