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现代医学的研究进展很快,这是因为采取了科学的设计方法。在进行实验设计时,必须先作出计划和具体步骤,订出方案,按方案办事。然而方案的内容、实验对象人数、选择对象的方法均要注意均衡性。本文就流行病学调查中的均衡性问题概述如下。一、均衡性的意义实验设计中常将观察对象利用随机分配的原则分成试验组及对照组,然后观察两组
The research of modern medicine is progressing rapidly because of the scientific method of design. When conducting experimental design, we must first make plans and concrete steps to formulate programs and work according to programs. However, the contents of the program, the number of subjects, the method of selecting the object should pay attention to the balance. This article summarizes the issues of equilibrium in epidemiological surveys as follows. First, the significance of the balance Experimental design often use the principle of random distribution of subjects divided into experimental group and control group, and then observed two groups