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一、两组配对资料的分析——配对卡方法临床上有时在同一人体观察不同时间的疗效,如第一疗程的疗效和第二疗程的疗效,比较两疗程间有效率的差别有无显著意义。这种资料若用第二讲中谈到的 X~2(2×2)法分析是不妥的,因为 X~2(2×2)法比较的是两组不同的患者。在同一批患者身上进行疗效观察,每个患者的疗效可能有以下四种情况:(1)第一疗程有效,第二疗程仍然有效,记作Ⅰ+Ⅱ+;(2)第一疗程有效,第二疗程反而无效,记作Ⅰ+Ⅱ-;(3)
First, the two groups of paired data analysis - matching card method clinically sometimes observed in the same human body at different times of the curative effect, such as the efficacy of the first course of treatment and the efficacy of the second course of treatment, comparing the difference between the two courses of any significant difference . This information if the second talk about the X ~ 2 (2 × 2) analysis is not appropriate, because the X ~ 2 (2 × 2) method is compared to two different groups of patients. In the same batch of patients for the efficacy of observation, the efficacy of each patient may have the following four situations: (1) the first course of treatment effective, the second course of treatment is still valid, recorded as Ⅰ + Ⅱ +; (2) the first course of treatment effective, The second course of treatment but invalid, recorded as Ⅰ + Ⅱ -; (3)