University of California, San Diego
I am a Ph.D. candidate in Biomedical Informatics at the University of California, San Diego, advised by Dr. Ronghui Xu and Dr. Siddharth Singh. I am especially interested in how real-world evidence informs decisions across drug discovery, clinical development, and regulatory review.
My research focuses on statistical methodology and its application to causal inference to generate regulatory-grade real-world evidence. My dissertation spans both. Methodologically, I develop data-fusion methods for indirect treatment comparisons across randomized trials when head-to-head evidence is unavailable. In application, I conduct observational studies of treatment safety and effectiveness in gastroenterology, using large-scale claims and EHR data (Optum, Epic Cosmos) with target trial emulation, propensity score methods, and survival analysis.
I am currently an FDA-OCE-ASA Oncology Educational Fellow (2026–2027), one of 20 fellows selected nationwide. My work has appeared in Clinical Gastroenterology and Hepatology, JAMA Network Open, Alimentary Pharmacology & Therapeutics, Hypertension, and Annals of Surgical Oncology, among others.
Previously, I earned an M.S. in Biostatistics from UCLA and a B.S. in Public Health from National Taiwan University, and worked as a Biostatistician Intern at Foundation Medicine, Inc.
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Education
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University of California, San DiegoPh.D. in Biomedical Informatics2023 – Jun. 2028 (expected) -
University of California, Los AngelesM.S. in Biostatistics2021 – 2023 -
National Taiwan UniversityB.S. in Public Health (Biostatistics Track)2016 – 2020
Honors & Awards
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FDA-OCE-ASA Oncology Educational Fellow2026
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NSF Travel Award, IMSI Workshop2026
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Best Poster Presentation Award, 16th GI/Hepatology Annual Research Symposium, UCSD Health2025
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J. Yang Scholarship, UCSD2023
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Honor Graduate, Department of Public Health, NTU2020
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Dr. K. P. Chen Memorial Scholarship, NTU2019
News
Selected Publications (view all )

Adjunctive GLP-1 Receptor Agonists in Patients with Inflammatory Bowel Diseases and Obesity and/or Diabetes: A Target Trial Emulation
Yeh KH, Ahuja D, Patel SB, Xu R, Park S, ..., Singh S* (* corresponding author)
Clinical Gastroenterology and Hepatology. 2026.
Adjunctive GLP-1 Receptor Agonists in Patients with Inflammatory Bowel Diseases and Obesity and/or Diabetes: A Target Trial Emulation
Yeh KH, Ahuja D, Patel SB, Xu R, Park S, ..., Singh S* (* corresponding author)
Clinical Gastroenterology and Hepatology. 2026.

Comparative Safety of Advanced Therapies for Crohn Disease
Park S, Ahuja D, Yeh KH†, Patel SB, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
JAMA Network Open. 2026;9(2):e2557922.
Comparative Safety of Advanced Therapies for Crohn Disease
Park S, Ahuja D, Yeh KH†, Patel SB, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
JAMA Network Open. 2026;9(2):e2557922.
Comparative Safety of Advanced Therapies in Patients with Ulcerative Colitis: An Administrative Claims-Based Study
Ahuja D, Dziegielewski C, Yeh KH†, Patel SB, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
American Journal of Gastroenterology. 2025.
Comparative Safety of Advanced Therapies in Patients with Ulcerative Colitis: An Administrative Claims-Based Study
Ahuja D, Dziegielewski C, Yeh KH†, Patel SB, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
American Journal of Gastroenterology. 2025.
Comparative Safety of Janus Kinase Inhibitors vs Tumor Necrosis Factor Antagonists in Patients with Inflammatory Bowel Diseases
Ahuja D, Yeh KH†, Patel SB, Lee HH, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
Clinical Gastroenterology and Hepatology. 2025.
Comparative Safety of Janus Kinase Inhibitors vs Tumor Necrosis Factor Antagonists in Patients with Inflammatory Bowel Diseases
Ahuja D, Yeh KH†, Patel SB, Lee HH, Goodwin SW, ..., Singh S* († co-first author, * corresponding author)
Clinical Gastroenterology and Hepatology. 2025.
Long-Term Outcomes of an Infliximab-First Versus Vedolizumab-First Treatment Strategy in Biologic-Naïve Patients with Ulcerative Colitis
Haynesworth A, Yeh KH†, Lee HH, Kirkpatrick M, ..., Singh S* († co-first author, * corresponding author)
Alimentary Pharmacology & Therapeutics. 2025;61(4):693-701.
Long-Term Outcomes of an Infliximab-First Versus Vedolizumab-First Treatment Strategy in Biologic-Naïve Patients with Ulcerative Colitis
Haynesworth A, Yeh KH†, Lee HH, Kirkpatrick M, ..., Singh S* († co-first author, * corresponding author)
Alimentary Pharmacology & Therapeutics. 2025;61(4):693-701.