Comparison of four tests for equality of survival curves in the presence of stratification and censoring
分层与删失下四种生存曲线相等性检验的比较
We conducted Monte Carlo experiments to investigate the small sample behaviour of four tests used to analyse stratified censored survival data. The size of the generalized Gehan and Mantel-Haenszel statistics were near nominal level α = 0⋅05. The observed size of the Cox partial likelihood ratio statistic was typically 0⋅065 for fewer than 32 observations per stratum and fell to near nominal levels for larger sample sizes. The continuity corrected Mantel-Haenszel statistic…