Research Article

New Test for the Comparison of Survival Curves to Detect Late Differences

Table 2

Estimated powers of the weighted log-rank test statistics for late differences.

(n1, n2) (censoring percent)LRGWTWPPMPPFH (1, 1)FH (0, 1)FH (1, 0)New

(100, 100) (0)0.73900.27260.45840.27260.26900.52660.91600.26820.8752
(100, 100) (20)0.63060.22320.37620.22320.22000.54280.85120.26600.7882
(100, 100) (40)0.50560.18000.28240.18000.17760.53260.73800.25240.6742
(100, 100) (60)0.34480.13720.20980.13720.13540.45280.55780.22740.4958
(80, 80) (0)0.62860.21020.36280.21020.20680.43380.84360.20660.8182
(80, 80) (20)0.53020.18400.30620.18400.18000.46200.76080.22060.7338
(80, 80) (40)0.41560.15600.24140.15600.15360.45220.64540.21720.6072
(80, 80) (60)0.29800.11140.17020.11140.11040.39100.48800.18480.4606
(50, 50) (0)0.41900.14020.22860.14020.13780.28680.62720.13760.6764
(50, 50) (20)0.34100.12060.19200.12060.11840.29640.53060.14040.5508
(50, 50) (40)0.26700.10560.15760.10560.10400.29080.42840.13960.4512
(50, 50) (60)0.18120.08480.12040.08480.08420.24280.30840.12700.3258
(20, 20) (0)0.16780.07760.11000.07760.07300.13960.26900.07300.3546
(20, 20) (20)0.15180.07160.09740.07160.07040.14760.23600.07840.2782
(20, 20) (40)0.11940.06520.08320.06520.06420.13420.18940.07520.2156
(20, 20) (60)0.09600.05800.07120.05800.05580.12720.15800.07160.1734