流行病学病因研究表明,病因是引起疾病发生的诸因素之联合作用。这种联合作用可的方式可以是多种多样的,研究比较多的有因素的相加、协同和拮抗等。本文拟结合实际例子,阐述疾病的多因素作用的其它一些模式。向量空间模式在研究二维(多维)变量(X、Y)的性质性,我们认为它不仅与 X 及 Y 有关,而且又依 Epidemiological etiology studies have shown that the etiology is a combination of factors that cause the disease to occur. This combination of actions can be a variety of ways to study more factors such as the addition, coordination and antagonism. This article is intended to illustrate some of the other modes of multi-factorial effects of disease in combination with practical examples. The vector space model is studying the nature of two-dimensional (multidimensional) variables (X, Y). We think that it is not only related to X and Y, but also depends on