170 citations · 897 across the 35 of their papers we have counts for
7 papers · 1 filter
Asymptotic Properties of Multi-Treatment Covariate Adaptive Randomization Procedures for Balancing Observed and Unobserved Covariates
Li-Xin Zhang
Applications of CAR for balancing continuous covariates remain comparatively rare, especially in multi-treatment clinical trials, and the theoretical properties of multi-treatment…
On the Theory of Covariate-Adaptive Designs
Feifang Hu, Li-Xin Zhang
Pocock and Simon's marginal procedure (Pocock and Simon, 1975) is often implemented forbalancing treatment allocation over influential covariates in clinical trials. However, the t…
Efficient Covariate-Adaptive Randomization with Smallest Selection Bias in Clinical Trials
Li-Xin Zhang
The power of conventional hypothesis tests and the selection bias in covariate-adaptive randomized clinical trials are typically investigated through simulation studies. In this ar…
Efficient randomized-adaptive designs
Feifang Hu, Li-Xin Zhang, Xuming He
Response-adaptive randomization has recently attracted a lot of attention in the literature. In this paper, we propose a new and simple family of response-adaptive randomization pr…
Immigrated urn models - asymptotic properties and applications
Li-Xin Zhang, Feifang Hu, Siu Hung Cheung +1
Urn models have been widely studied and applied in both scientific and social science disciplines. In clinical studies, the adoption of urn models in treatment allocation schemes h…
Adaptive Allocation Theory in Clinical Trials
Li-Xin Zhang
Various adaptive randomization procedures (adaptive designs) have been proposed to clinical trials. This paper discusses several broad families of procedures, such as the play-the-…