The asymptotic properties of nonparametric tests for comparing survival distributions

摘要: The asymptotic distribution under alternative hypotheses is derived for a class of statistics used to test the equality two survival distributions in presence arbitrary, and possibly unequal, right censoring. include equivalents log rank statistic, modified Wilcoxon statistic invariant procedures introduced by Peto & Peto. When there are equal censoring hazard functions proportional sample size formula F compare exponential samples shown be valid test. In certain situations power falls as amount decreases.