Yizhen Xu

Yizhen Xu, PhD

Languages spoken: English

Academic Information

Departments Primary - Population Health Sciences

I am an Assistant Professor in the Division of Biostatistics, Department of Population Health Sciences, at the University of Utah School of Medicine. I had my postdoctoral training at the Biostatistics Department and School of Medicine at the Johns Hopkins University. I work with Dr. Scott Zeger on longitudinal causal inference methodology to account for patient heterogeneity, with applications in Scleroderma and SARS-CoV-2, and Dr. Zheyu Wang on Bayesian latent variable modeling of progression in the Alzheimer's Disease. I received my Ph.D. training in Biostatistics with Dr. Joseph W. Hogan at Brown University.

Research Statement

My research focuses on the development of innovative Bayesian latent variable modeling, statistical ensemble learning, and causal inference methods for electronic health records. Applications involve infectious and chronic diseases such as HIV, Scleroderma, Alzheimer’s disease, and SARS-CoV-2. For more information about my research, please refer to website https://yizhenxu.github.io/.

Education History

Fellowship Johns Hopkins University
 Postdoctoral Fellow
Doctoral Training Brown University
 PhD
Graduate Training Yale University
 MS
Undergraduate University of Science and Technology of China
 BS

Selected Publications

Journal Article

  1. Xu Y, Kim JS, Hummers LK, Shah AA, Zeger SL (2024). Causal inference using multivariate generalized linear mixed-effects models. Biometrics, 80(3).
  2. Xu Y, Hogan J, Daniels M, Kantor R, Mwangi A (2024). Augmentation Samplers for Multinomial Probit Bayesian Additive Regression Trees. J Comput Graph Stat.
  3. Stephanie M Delong, Yizhen Xu, Paula Braitstein, Monicah Nyambura, Samson Ndege, Suzanne Goodrich, Caren Tarus, Joseph W Hogan, Becky L Genberg (2023). Population-Based Estimates and Predictors of Child and Adolescent Linkage to HIV Care or Death in Western Kenya. Journal of Acquired Immune Deficiency Syndromes.
  4. Bowring MG, Wang Z, Xu Y, Betz J, Muschelli J, Garibaldi BT, Zeger SL (2020). Outcome-Stratified Analysis of Biomarker Trajectories for Patients Infected With Severe Acute Respiratory Syndrome Coronavirus 2. Am J Epidemiol, 190(10), 2094-2106. (Read full article)
  5. Chan PA, King E, Xu Y, Goedel W, Lasher L, Vargas M, Brindamour K, Huard R, Clyne A, McDonald J, Bandy U, Yokum D, Rogers ML, Chambers L, Napoleon SC, Alexander-Scott N, Hogan JW (2021). Seroprevalence of SARS-CoV-2 Antibodies in Rhode Island From a Statewide Random Sample. Am J Public Health, 111(4), 700-703. (Read full article)
  6. Genberg BL, Hogan JW, Xu Y, Nyambura M, Tarus C, Rotich E, Kafu C, Wachira J, Goodrich S, Braitstein P (2019). Population-based estimates of engagement in HIV care and mortality using double-sampling methods following home-based counseling and testing in western Kenya. PLoS One, 14(10), e0223187. (Read full article)
  7. Xu Y, Liu T, Daniels MJ, Kantor R, Mwangi A, Hogan JW (2019). Classification using ensemble learning under weighted misclassification loss. Stat Med, 38(11), 2002-2012. (Read full article)
  8. Liu T, Hogan JW, Daniels MJ, Coetzer M, Xu Y, Bove G, DeLong AK, Ledingham L, Orido M, Diero L, Kantor R (2017). Improved HIV-1 Viral Load Monitoring Capacity Using Pooled Testing With Marker-Assisted Deconvolution. J Acquir Immune Defic Syndr, 75(5), 580-587. (Read full article)