Statistical power declines rapidly with decreasing allele frequency and effect size, but it can be enhanced by increasing sample size and by selecting appropriate subjects ...

Statistical power refers to the odds that a study will find an effect—say, whether antipsychotic drugs affect schizophrenia symptoms, ...

Although neither of these trials reached statistical power for their respective end points, no benefit of completion axillary-lymph-node dissection was observed after 10 years of follow-up. 8,9 ...

Peter Green, president of Britain’s Royal Statistical Society, says that while many of the report’s points about statistical power are valid, ...