TwoSampleSurvival.Equality {TrialSize} | R Documentation |
Test for two sample equality in exponential model for survival data
Description
H0: the difference between the hazard rates of two samples is equal to
Ha: not equal to 0
The test is finding whether there is a difference between the hazard rates of the test drug and the reference drug.
Usage
TwoSampleSurvival.Equality(alpha, beta, lam1, lam2, k, ttotal, taccrual, gamma)
Arguments
alpha |
significance level |
beta |
power = 1-beta |
lam1 |
the hazard rates of control group |
lam2 |
the hazard rates of a test drug |
k |
k=n1/n2 sample size ratio |
ttotal |
Total trial time |
taccrual |
accrual time period |
gamma |
parameter for exponential distribution. Assume Uniform patient entry if gamma =0 |
References
Chow SC, Shao J, Wang H. Sample Size Calculation in Clinical Research. New York: Marcel Dekker, 2003
Examples
Example.7.2.4<-TwoSampleSurvival.Equality(0.05,0.2,1,2,1,3,1,0.00001)
Example.7.2.4
[Package TrialSize version 1.4 Index]