一般见到的四格表有两种:一种是分组四格表,另一种是配对四格表,都是描述计数资料的类别关系的;但两者实验设计的目的不同。前者有时是要比较两组的阳性率(或阴性率)或死亡率(或存活率)等等的差别的,表里面的数字是观察的个体数;后者是要比较甲法有效而乙法无效和乙法有效而甲法无效的这两者的差别的,而且还应考虑到甲法乙法都有 There are two types of four-cell tables that are commonly seen: one is a grouped four-cell table, and the other is a paired four-cell table, all of which describe the category relationship of count data; however, the purpose of the two experimental designs is different. The former is sometimes to compare the positive rate (or negative rate) or mortality rate (or survival rate) of the two groups, the number in the table is the observed number of individuals; the latter is to compare the effectiveness of a method and B method The difference between the invalid and the B-effective and the A-effective, but also should take into account that A law and B law have