临床流行病学是流行病学原理和方法在临床实践中的应用。流行病学比临床医学对于正确判定健康和疾病、正常与异常以及认识临床观察与诊断策略等,更具有重要的价值。因为健康是与疾病处于动态平衡之中。所谓正常,指的是最常发生的事件或是事件的通常情况。凡是经常发生的认为是正常,发生稀少的称为异常。因此,可以说“正常”是统计学的概念,可测量的体 Clinical epidemiology is the application of epidemiological principles and methods in clinical practice. Epidemiology is more important than clinical medicine in correctly determining health and disease, normal and abnormal, and understanding clinical observations and diagnostic strategies. Because health is in a dynamic balance with the disease. The so-called normal, refers to the most common occurrence or event of the case. Anything that happens often is normal and sparse is called anomaly. Therefore, it can be said that “normal” is a concept of statistics, measurable body