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Research Interests

Dr. Hu's statistical research has primarily been in methodological development for handling data with complex structures. Her contributions in the area include pseudo-likelihood based and estimating function approaches with supplementary information. Growing from her early work on incomplete event history data, such as censored/truncated lifetimes and panel counts, Dr. Hu's current interests are in various unconventional point process data. Her on-going projects include analyses of longitudinal data with latent classes and marked point processes with spatial correlations.

Dr. Hu has collaborated with investigators from a variety of research fields, including HIV/AIDS, cancer, public health, reliability, forest fire management, psychology, political sciences, sports analytics, and substance use disorder. She enjoys identifying statistical problems from real-life projects and developing approaches to dealing with the challenges.

Postdoctoral Positions

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Teaching (in the current academic year)

• STAT-305/605. Introduction to Biostatistical Methods for Health Sciences, fall 2024
• STAT-203. Introduction to Statistics for Social Sciences, spring 2025
• STAT-854. Biometrics: Methods in Biomedical Studies , spring 2025

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Brief Biography

Dr. Hu received her PhD in statistics at University of Waterloo under the supervision of Jerry Lawless. Following her research experiences at Health Canada and Harvard School of Public Health, she was on the faculty at University of Memphis and an adjunct faculty member at St. Jude Children's Research Hospital. Dr. Hu joined Department of Statistics and Actuarial Sciences at Simon Fraser University in 2003, and is now a Professor of Statistics. She has taught courses at all the levels at SFU, and participated in the development of the biostatistics-related courses of the department.

Dr. Hu obtained an NSERC Discovery Accelerator Supplements (DAS) (2016-2019), an NSERC University Faculty Award (2003-2008), the Frank Wilcoxon Prize of 1998 (jointly with JF Lawless and K Suzuki), and the Pierre Robillard Award of 1996. She is an American Statistical Association (ASA) fellow and an elected International Statistical Institute (ISI) member. Dr. Hu is an Associate Editor of Canadian Journal of Statistics (2022-present) and Lifetime Data Analysis (2020-present). She was an Editor-in-Chief of Statistics in Biosciences (2021-2023), and served on the editorial boards of Canadian Journal of Statistics (2010-2012), Lifetime Data Analysis (2010-2017), Statistical Papers (2011-2016), and Statistics in Biosciences (2009-2020). (CV2024)

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Featured Publications (in the last six years)

Papers in Statistical Journals (* denotes a trainee)

Braun, W.J., Hu, X.J., and *Kang, X. (2018) ``Data Sharpening in Local Regression Guided by Global Constraint," Statistica Sinica, 28: 2733-48. (Supplementary Material)

*Xiong, Y., Bingham, D., Braun, W.J., and Hu, X.J. (2018) ``Moran's I Statistic-Based Nonparametric Test with Spatio-Temporal Observations," Journal of Nonparametric Statistics, 31:1, 244-267 DOI: 10.1080/10485252.2018.1550197

*Kang, K., Song, X., Hu, X.J., and Zhu, H. (2018) ``Bayesian adaptive group lasso with semiparametric hidden Markov models," Statistics in Medicine, 38:9, 1634-1650 DOI: 10.1002/sim.8051

Liu, L, Liu, Y., *Xiong, Y, and Hu, X.J. (2019) ``Cox Regression of Clustered Event Times with Covariates Missing Not at Random," Scandinavian Journal of Statistics, 46(4), 1315-1346.

*Li, D., Hu, X.J., McBride, M.L., and Spinelli, J.J. (2020) ``Multiple Event Times in the Presence of Informative Censoring: Modeling and Analysis by Copulas", Lifetime Data Analysis, 26: 573-602. doi: 10.1007/s10985-019-09490-0

*Guo, L., *Xiong, Y., and Hu, X.J. (2020) ``Estimation under Cox Cure Model with Covariates Missing Not at Random, with Application to Disease Screening/Prediction", Canadian Journal of Statistics, 48: 608-632. doi:10.1002/cjs.11550

*Xiong, Y., Braun, W.J., and Hu, X.J. (2021) ``Estimating duration distribution aided by auxiliary longitudinal measures in presence of missing time origin," Lifetime Data Analysis, 27(3), 388-412 DOI: 10.1007/s10985-021-09520-w. Epub

*Li, D., Hu, X.J., and Wang, R. (2023) ``Evaluating Association Between Two Event Times with Observations Subject to Informative Censoring", Journal of American Statistical Association, 118:542, 1282-1294. doi:10.1080/01621459.2021.1990766

*Xiong, Y., Braun, W.J., Duchesne, T. and Hu, X.J. (2023) ``Regression analysis of spatially correlated event durations with missing origins annotated by longitudinal measures", Statistica Sinica, 33: 2431-2461. doi: 10.5705/ss.202021.0118

*Thomson, T.J., Hu, X.J., and Nosyk, B. (2023+) ``Evaluating Effects of Various Exposures on Mortality Risk of Opioid Use Disorders with Linked Administrative Databases", Statistics in Biosciences, in press. doi:10.1007/s12561-023-09407-4

*Thomson, T.J., Hu, X.J., and Nosyk, B. (2023+) ``Estimating effects of time-varying exposures on mortality risk", Journal of Applied Statistics, in press. doi:10.1080/02664763.2024.2313459

Papers of Statistical Applications

Mackey, D., *Lachance, C.C., *Wang, P.T., Feldman, F. Laing, A.C. Leung, P.M., Hu, X.J., and Robinovitch, S.N. (2019). "Randomized trial of compliant flooring for the prevention of fall-related injuries in long term care: The Flooring for Injury Prevention (FLIP) Study", PLOS Medicine, DOI: 10.1136/bmjopen-2016-011757

*Thiessen, M., *Cui, Q., Hu, X.J., and Rosychuk R.J. (2020) "Exploring Spatio-temporal Patterns in Mental Health Related Emergency Department Use from Children and Adolescents", Spatial and Spatio-temporal Epidemiology, 34: 100358. doi: 10.1016/j.sste.2020.100358

*Wu, L.Y., *Danielson, A.J., Hu, X.J., and Swartz, T.B. (2021). "A Contextual Analysis of Crossing the Ball in Soccer", Journal of Quantitative Analysis in Sports, 17 (1): 57-66. doi: 10.1515/jqas-2020-0060

Rosychuk, R.J., *Chen, A.A., McRae, A., McLane, P., Ospina, M.B., Hu, X.J. (2022 ). ``Age-varying effects of repeated emergency department presentations for children in Canada", Journal of Health Services Research \& Policy, 27 (4): 278-286. doi: 10.1177/13558196221094248

Liu, J., *Bellows, B., Hu, X.J., Wu, J., Zhou, Z., Soteros, C., Wang, L. (2023). "A new time-varying coecient regression approach for analyzing infectious disease data", Scientic Reports, 13(1), 14687.

*Peng, K.K., Renouf, E.M., Dean, C.B., Hu, X.J., Delatolla, R., and Manuel, D.G. (2023) ``An exploration of the relationship between wastewater viral signals and COVID-19 hospitalizations in Ottawa, Canada", Infectious Disease Modelling, 8: 617-631. doi: 10.1016/j.idm.2023.05.011

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Last modified in February 2024