Related Experiment Videos
A simple method of sample size calculation for unequal-sample-size designs that use the logrank or t-test
1Department of Epidemiology and Social Medicine, Albert Einstein College of Medicine, Bronx, New York 10461.
Statistics in Medicine
|July 1, 1987
Abstract:
This paper presents a simple method of calculating sample sizes for unequal-sample-size designs with use of published tables applicable to equal-sample-size design. The method applies to both the logrank test and the t-test. For the power of logrank test, this paper compares the proposed method with existing methods and with the Monte Carlo simulation.