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流行病学调查所探究的暴露与未暴露组“疾病率”之间(或病例组与对照组两者各自的暴露比例之间),其差别的机率取决于很多因素。这些因素当中之一,是关于研究对象本身的大小,下面,分别对决定回顾性和前瞻性调查样本的大小提出若干注意点,讨论的重点在于了解关于调查研究的把握度(POWER)这一统计学概念。
The probability of the difference between the “disease rate” of the exposed and unexposed groups (or between the respective exposure ratios of the case group and the control group) explored by the epidemiological survey depends on many factors. One of these factors is related to the size of the research subject itself. The following points are made to determine the size of the retrospective and prospective survey sample. The focus of the discussion is to understand the statistical power of the investigation study (POWER). Learn concept.