Ranked Set Sampling for Survival Analysis: A Unified Framework

This paper addresses a significant gap in survival analysis by developing a comprehensive framework for using Ranked Set Sampling (RSS). RSS is a cost-effective sampling technique that can improve precision. The paper extends existing RSS methods, which were primarily limited to Kaplan-Meier estimation, to include a broader range of survival analysis tools like log-rank tests and mean survival time summaries. This is crucial because it allows researchers to leverage the benefits of RSS in more complex survival analysis scenarios, particularly when dealing with imperfect ranking and censoring. The development of variance estimators and the provision of practical implementation details further enhance the paper's impact.