title: A simple method of sample size calculation for unequal-sample-size designs that use the logrank or t-test.
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.
authors: Department of Epidemiology and Social Medicine, Albert Einstein College of Medicine, Bronx, New York 10461.
authors: F Y
authors: FY
authors: Hsieh
mesh_terms: D002986:Clinical Trials as Topic; D003627:Data Interpretation, Statistical; D006801:Humans; D009010:Monte Carlo Method; D011336:Probability