Testing Quasi-Independence of Failure and Truncation Times via Conditional Kendall's Tau
基于条件 Kendall τ 的失效时间与截断时间拟独立性检验
Truncated survival data arise when the failure time is observed only if it falls within a subject-specific truncating set. Most analysis methods rely on the key assumption of quasi-independence, that is, factorization of the joint density of failure and truncation times into a product proportional to the individual densities in the observable region. Unlike independence of failure time and censoring time, quasi-independence can be tested. Tests of quasi-independence are…