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概述:样本大小是临床研究的一个重要参数。然而,把握度和样本量分析对许多生物医学和社会心理调查者来说似乎是一个统计学家的魔术。在本文中,我们继续讨论二分类结果的把握度和样本量的计算。我们再次强调了在建立假设和进行把握度分析中调查者和生物统计学家之间密切联系的重要性。
Overview: Sample size is an important parameter in clinical research. However, the power and sample size analysis seems to be a statistician’s magic for many biomedical and psychosocial investigators. In this article, we continue to discuss the power of the dichotomous results and the calculation of the sample size. Again, we stress the importance of the close relationship between investigators and biostatisticians in setting up assumptions and conducting a proficiency analysis.