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Table 4 The empirical type I error rates of the tests at the significance level 0.05 when the survival times have the same uniform, exponential, or log-normal distributions with sample sizes n 1 = 20, n 2 = 25, n 3 = 25, n 4 = 30

From: Comparing survival curves based on medians

Distributions and parameters Censoring rate BC TJ New
Uniform distribution
θ = (10,10,10,10)
a = (4,4,4,4)
c = (2,2,2,2)
0 0.071 0.051 0.054
0.1 0.080 0.073 0.053
0.2 0.082 0.092 0.045
0.3 0.090 0.121 0.045
Exponential distribution
θ = (10,10,10,10)
a = (0.1,0.1,0.1,0.1)
0 0.066 0.046 0.049
0.1 0.074 0.055 0.056
0.2 0.078 0.068 0.051
0.3 0.084 0.087 0.050
Log-normal distribution
θ = (log(10), log(10), log(10), log(10))
a = (0.3,0.3,0.3,0.3)
0 0.068 0.048 0.053
0.1 0.073 0.064 0.051
0.2 0.081 0.085 0.052
0.3 0.080 0.103 0.044