Weighted Logrank Statistics in Sequential Tests

Figures & data

Table 1. Selected C ₁(α, n) values for Test 1.1

n	α = 0.1	α = 0.05	α = 0.01
50	2.74	3.02	3.56
89	2.79	3.06	3.59
100	2.80	3.07	3.60
150	2.89	3.10	3.63
200	2.89	3.12	3.64
500	2.91	3.17	3.68
1000	2.95	3.20	3.71
1500	2.97	3.22	3.73
2000	2.98	3.23	3.74

Figure 1 VACURG data: (a) Test 1.1 with C ₁(0.05, 100) = 3.07; (b) Test 1.2 with n = 89 and .

Figure 2 CALGB data: (a) Test 1.1 with C ₁(0.1, 150) = 2.89; (b) Test 1.2 with n = 111 and .