Search Results for author: Peter B. Gilbert

Found 4 papers, 4 papers with code

A general framework for inference on algorithm-agnostic variable importance

3 code implementations7 Apr 2020 Brian D. Williamson, Peter B. Gilbert, Noah R. Simon, Marco Carone

In many applications, it is of interest to assess the relative contribution of features (or subsets of features) toward the goal of predicting a response -- in other words, to gauge the variable importance of features.

valid

Efficient nonparametric inference on the effects of stochastic interventions under two-phase sampling, with applications to vaccine efficacy trials

3 code implementations30 Mar 2020 Nima S. Hejazi, Mark J. Van Der Laan, Holly E. Janes, Peter B. Gilbert, David C. Benkeser

We propose nonparametric methodology for efficiently estimating a counterfactual parameter that quantifies the impact of a given immune response marker on the subsequent probability of infection.

Methodology

Post-randomization Biomarker Effect Modification in an HIV Vaccine Clinical Trial

1 code implementation9 Nov 2018 Peter B. Gilbert, Bryan S. Blette, Bryan E. Shepherd, Michael G. Hudgens

While the HVTN 505 trial showed no overall efficacy of the tested vaccine to prevent HIV infection over placebo, previous studies, biological theories, and the finding that immune response markers strongly correlated with infection in vaccine recipients generated the hypothesis that a qualitative interaction occurred.

Applications

Generating survival times using Cox proportional hazards models with cyclic time-varying covariates, with application to a multiple-dose monoclonal antibody clinical trial

1 code implementation25 Jan 2018 Yunda Huang, Yuanyuan Zhang, Zong Zhang, Peter B. Gilbert

In two harmonized efficacy studies to prevent HIV infection through multiple infusions of the monoclonal antibody VRC01, a key objective is to evaluate whether the serum concentration of VRC01, which changes cyclically over time along with the infusion schedule, is associated with the rate of HIV infection.

Methodology

Cannot find the paper you are looking for? You can Submit a new open access paper.