| Literature DB >> 25339496 |
Abstract
In this paper, an exact variance of the one-sample log-rank test statistic is derived under the alternative hypothesis, and a sample size formula is proposed based on the derived exact variance. Simulation results showed that the proposed sample size formula provides adequate power to design a study to compare the survival of a single sample with that of a standard population.Keywords: counting process; one-sample log-rank test; sample size formula; standard population; time to event
Mesh:
Year: 2014 PMID: 25339496 DOI: 10.1002/pst.1654
Source DB: PubMed Journal: Pharm Stat ISSN: 1539-1604 Impact factor: 1.894