CLUSTERING AND META-ANALYSIS USING A MIXTURE OF DEPENDENT LINEAR TAIL-FREE PRIORS

• 成果类型: Article
• 署名作者: Flores, Bernardo; Muller, Peter
• 署名单位: University of Texas System; University of Texas Austin
• 刊物名称: ANNALS OF APPLIED STATISTICS
• ISSN/ISSBN: 1932-6157; 1941-7330
• DOI: 10.1214/25-AOAS2028
• 发表日期: 2025-09
• 页码: 2053-2069
• 关键词: Bayesian Nonparametrics; dirichlet process mixture; P & oacute; lya tree; Meta-analysis

摘要

We propose a novel nonparametric Bayesian approach for meta-analysis with event time outcomes. The model is an extension of linear dependent tail-free processes. The extension includes a modification to facilitate (conditionally) conjugate posterior updating and a hierarchical extension with a random partition of studies. The partition is formalized as a Dirichlet process mixture. The model development is motivated by a meta-analysis of cancer immunotherapy studies. The aim is to validate the use of relevant biomarkers in the design of immunotherapy studies. The hypothesis is about immunotherapy in general, rather than about a specific tumor type, therapy and marker. This broad hypothesis leads to a very diverse set of studies being included in the analysis and gives rise to substantial heterogeneity across studies.