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Table 1 The empirical type I error rates of the tests at the significance level of 0.05 when the survival times have the same uniform, exponential, or log-normal distributions with sample sizes n 1 = 100, n 2 = 150, n 3 = 150, n 4 = 200 (simulation study with 10,000 replicates for each situation)

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

0.053

0.049

0.051

0.1

0.052

0.070

0.047

0.2

0.057

0.092

0.049

0.3

0.057

0.114

0.047

Exponential distribution

  θ = (10,10,10,10)

  a = (0.1,0.1,0.1,0.1)

0

0.050

0.047

0.047

0.1

0.052

0.056

0.050

0.2

0.053

0.068

0.050

0.3

0.051

0.083

0.047

Log-normal distribution

  θ = (log(10), log(10), log(10), log(10))

  a = (0.3,0.3,0.3,0.3)

0

0.057

0.052

0.054

0.1

0.055

0.065

0.050

0.2

0.054

0.082

0.050

0.3

0.054

0.104

0.050