Events that appear on this page are in the Sponsoring Department of "Biostatistics" with "Dissertation Defenses" as its Category.
To add or edit events on this page, go to http://publichealth.pitt.edu/submit
Song Zhang of the Department of Biostatistics defends her dissertation on "Diagnostic Accuracy Analysis for Ordinal Competing Risks Outcomes Using ROC Surface".
Yongli Shuai of the Department of Biostatistics defends his dissertation on "Multinomial Logistic Regression and Prediction Accuracy for Interval-Censored Competing Risks Data".
Alice Liu of the Department of Biostatistics defends her dissertation on "Efficient Estimation of the Quantile Residual Lifetime Using Auxiliary Covariates"
Graduate faculty of the University and all other interested parties are invited to attend.
Quantile residual lifetime (QRL) is of significant interest in many clinical studies as an easily interpretable quantity compared to other summary measures of survival distributions. In cancer or other fatal diseases, treatments are often compared based on the distributions or quantiles of the residual lifetime. For experimental designs, such as for randomized control trials, there is often no interest or need to adjust for the confounding factors due to the nature of the randomization. However, when there is missing data, adding the covariate information can help in improving the efficiency of estimators, e.g., the estimated treatment effect. In this study, we proposed an augmented inverse probability weighting estimator (AIPW) for QRL by incorporating the auxiliary covariate information in the presence of right-censoring. Simulation studies shows that our proposed estimator has smaller variance compared to the inverse probability estimator (IPW) and the Kaplan-Meier type estimator for the QRL when the auxiliary covariate is related to the survival outcome. In contrast, there is minimal efficiency gain over our previously proposed test of equality of two QRLs when using the AIPW estimator compared to the IPW or Kaplan-Meier type estimators.
Last Updated On Monday, October 23, 2017 by Valenti, Renee Nerozzi
Created On Monday, June 19, 2017
The schedule of dissertation defenses in the Department of Biostatistics is maintained by:
Share the details for your defense to ensure it is displayed here as well as on the department calendar, Pitt Public Health's calendar, Weekly Update, and LCD screens.
Update Your Profile
Tools and Templates