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医学研究的结果往往受以下三方面的影响:①研究结果确为所采用的主要观察因素的影响,能达到预期研究目的;②受到各种误差的干扰;③受到偏倚的干扰.人们常用医学研究应遵守的实验设计中对照、均衡、随机、重复等基本原则做为防止误差与偏椅的手段.对于儿童保健研究者也不例外,儿童保健的研究工作除面对个体的临床实验研究外,还有大量的面对群体的防治研究.对于临床实验研究的设计在不少统计书中已涉及,此文仅就群体研究如何控制偏倚问题简述之.
The results of medical research are often affected by the following three aspects: ① the results of the study is indeed the main factors used to achieve the expected purpose of the study; ② by a variety of error interference; ③ subject to bias interference. People commonly used medical research The basic principles of control, equilibrium, randomness and repetition should be taken as means to prevent errors and deviation from the experimental design which should be abided by.For the children’s health researchers, the research work of children’s health is not only to face the individual’s clinical experimental research, There are also a large number of prevention and treatment research in the face of groups.For the design of clinical experimental research has been covered in many statistical books, this article only on the group study on how to control the bias of brief.