Yajuan Si
- Email Yajuan Si
- (734)764-6935
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BIO
Yajuan Si is a Research Associate Professor in the Survey Methodology Program, located within the Survey Research Center at the Institute for Social Research on the University of Michigan-Ann Arbor campus. She received her Ph.D on Statistical Science in 2012 from Duke University. Before joining the University of Michigan in 2017, Yajuan was an assistant professor jointly in the Department of Biostatistics & Medical Informatics and the Department of Population Health Sciences at the University of Wisconsin-Madison and a Postdoctoral Research Scholar in the Department of Statistics at Columbia University. Dr Si’s research lies in cutting-edge methodology development in streams of Bayesian statistics, complex survey inference, missing data imputation, causal inference, and data confidentiality protection. Yajuan has extensive collaboration experiences with health services researchers and epidemiologists to improve healthcare and public health practice, and she has been providing statistical support to solve sampling and analysis issues on health and social science surveys.
- Yajuan Si, James Robert Wagner, Ronald C. Kessler. 2026. Probability, Probability-Based, and Nonprobability Surveys in Psychiatric Epidemiological Research. JAMA Psychiatry 83(3):298-305.
- Grace S. Chung, Yajuan Si, et al.. 2026. Attainment of global diabetes targets in 2021: a pooled analysis of individual-level data from national surveys in 100 low-income, middle-income, and high-income countries. The Lancet Global Health 14(1):e21-e32.
- Brady Thomas West, Yajuan Si, Yueying Hu, Sean Esteban McCabe, Philip Todd Veliz. 2025. The role of weighting adjustment for attrition in longitudinal trajectory modeling: a simulation study. Communications in Statistics - Simulation and Computation 54(3):866-888 .
- Forthman, Katherine L., Kuplicki, Rayus, Thompson, Wesley K., Nemeroff, Charles B., Yajuan Si, Fan, Chun Chieh, Paulus, Martin P.. 2025. Treatment resistant depression: Socio-demographic characteristics, comorbidity and treatment patterns from the All of Us Research Program. Journal of Affective Disorders 390:119858.
- Shiyu Zhang, Yajuan Si, John Dziak. 2025. How to manage missing covariates in randomized controlled trials: a comparison of strategies. BMC Medical Research Methodology 25(1):264.
- Shirley Mathur, Yajuan Si, Jerome P Reiter. 2024. Fully Synthetic Data for Complex Surveys. Survey methodology 50(2):347.
- Zikai Lin, Yajuan Si, Jian Kang. 2024. Latent subgroup identification in image-on-scalar regression. The Annals of Applied Statistics 18(1):468-486.
- Yajuan Si, Roderick J Little, Ya Mo, Nell Sedransk. 2024. Nonresponse Bias Analysis in Longitudinal Studies: A Comparative Review with an Application to the Early Childhood Longitudinal Study. International Statistical Review 92(3):383-405.
- Yajuan Si, Sunghee Lee, Steven G Heeringa. 2023. Population Weighting in Statistical Analysis. JAMA Internal Medicine 184(1):98-99.
- Demidenko, Michael I., Edward Huntley, Du, Licheng, Estor, Caitlin, Yajuan Si, Wagner, Christine, Philippa J Clarke, Daniel P Keating. 2023. Individual and Community level Developmental Adversities: Associations with Marijuana and Alcohol Use in Late-Adolescents and Young Adults. Journal of Youth and Adolescence 53:799-813.
