Research Interests

• Clinical Trials

• Censored Survival Analysis

• Semiparametric Methods with Missing and Censored Data

• Longitudinal Data Analysis

• Causal Inference
   

Publications

• LEE, C. & Lu, X. (2005). Choice between Partial Least Square and Neural Network Predictive Models. International Journal of Computer and Information Science, Vol.6, No.1.

• Lu, X. & Tsiatis, A. A. (2007). Improving the efficiency of the log-rank test using auxiliary covariates. Biometrika. In Press.

• Tsiatis, A. A., Davidian M., Zhang M. & Lu, X. (2007). Covariate adjustment for two-stage treatment comparisons in randomized clinical trials: A principles yet flexible approach. Submitted to Statistics in Medicine special issue on "Statistical methods in HIV/AIDS and its practical application." In Press.
   

Presentations

• Comparing stratified rank-based tests. Biostatistics and Research Decision Sciences (BARDS) department, Merck Research Laboratories, North Wales, PA, August 3, 2006.

• Improving the efficiency of the log-rank test using auxiliary covariates. Joint Statistical Meetings (JSM), August 10, 2006.
   

Projects and Papers

• Selection between Parameter Estimation Methods (2003), master’s thesis at Central Michigan University.

• Fitting Linear Model under Skew Normal Assumption (2004), project paper for the course of Multivariate Analysis.

• Comparison of Three Weighted Logrank Tests (2005), A Simulation Study.

• Ph.D. Prelim Written Exam paper (2005) at North Carolina State University.
  - Regression Models for Clustered Ordinal Data, A Review, &
  - Comparison of Four Methods for Clustered Ordinal Data, A Simulation Study.