Calculation of power for matched pair studies when randomization is by group.
作者信息
Shipley M J, Smith P G, Dramaix M
机构信息
Department of Epidemiology and Population Sciences, London School of Hygiene and Tropical Medicine, UK.
出版信息
Int J Epidemiol. 1989 Jun;18(2):457-61. doi: 10.1093/ije/18.2.457.
PMID:2767863
Abstract
A formula is given for the calculation of the statistical power of paired intervention trials in which the units of randomization are groups rather than individuals. Factors affecting the power of such trials are also investigated and an example is given where the power of group randomization is compared to that of individual randomization.
摘要
Zotero 插件