从整个人群得到的观察资料是粗糙的,而且常常不准确;不同观察者所取得的资料相比较时特别隐藏着危险。流行病学家应运用周密的思维去解释有缺陷的资料。观察者变差在临床实践中也是重要问题,但是流行病学上的要求促进了其研究的特别发展。它主要是为评价资料的质量并且使之改善提供根据。 Observations obtained from the entire population are rough and often inaccurate; the data obtained by different observers is particularly dangerous when compared to those obtained. Epidemiologists should use thoughtful thinking to explain flawed information. Observer variability is also an important issue in clinical practice, but epidemiological requirements have contributed to the particular development of its research. It mainly provides the basis for evaluating the quality of information and improving it.