Kim Mimi Y, Xue Xiaonan, Du Yunling
Division of Biostatistics, Department of Epidemiology and Population Health, Albert Einstein College of Medicine, Bronx, New York 10461, USA.
Biometrics. 2006 Sep;62(3):929-33; discussion 933. doi: 10.1111/j.1541-0420.2006.00639_1.x.
An approach for determining the power of a case-cohort study for a single binary exposure variable and a low failure rate was recently proposed by Cai and Zeng (2004, Biometrics 60, 1015-1024). In this article, we show that computing power for a case-cohort study using a standard case-control method yields nearly identical levels of power. An advantage of the case-control approach is that existing sample size software can be used for the calculations. We also propose an additional formula for computing the power of a case-cohort study for the situation when the event is not rare.
蔡和曾（2004年，《生物统计学》60卷，第1015 - 1024页）最近提出了一种用于确定单二元暴露变量且失败率较低的病例队列研究功效的方法。在本文中，我们表明，使用标准病例对照方法计算病例队列研究的功效会产生几乎相同的功效水平。病例对照方法的一个优点是现有的样本量软件可用于计算。我们还针对事件并非罕见的情况，提出了另一个计算病例队列研究功效的公式。
