Hajian-Tilaki Karimollah
Department of Social Medicine and Health, Babol University of Medical Sciences, Babol, Iran.
Caspian J Intern Med. 2011 Fall;2(4):289-98.
This review basically provided a conceptual framework for sample size calculation in epidemiologic studies with various designs and outcomes. The formula requirement of sample size was drawn based on statistical principles for both descriptive and comparative studies. The required sample size was estimated and presented graphically with different effect sizes and power of statistical test at 95% confidence level. This would help the clinicians to decide and ascertain a suitable sample size in research protocol in order to detect an effect of interest.
本综述基本提供了一个概念框架,用于各种设计和结果的流行病学研究中的样本量计算。样本量的公式要求是根据描述性研究和比较性研究的统计原则得出的。在95%置信水平下,根据不同的效应大小和统计检验效能对所需样本量进行了估计并以图表形式呈现。这将有助于临床医生在研究方案中确定合适的样本量,以便检测出感兴趣的效应。