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集合法是根据一个医院中出生的两个连续的同类缺陷儿间的围产儿数ｘ的多少进行判断的。若有几个ｘ小于给定的界值时，可认为该类出生缺陷的发生有增加，由于该法仅利用了部分ｘ与界值的相对大小，未充分利用样本的信息，本文将利用信息多的累计和法的基本思想引入集合法，提出了利用信息多的改进集合法。
The set method is based on the number of perinatal children x between two consecutive congenital defects born in a hospital. If several x are smaller than a given threshold, the occurrence of birth defects of this type may be considered to increase. Because this method only uses the relative size of the partial x and the boundary value, the information of the sample is not fully utilized. This article will use information. The basic idea of many cumulative sums is to introduce a set method, and an improved set method using multiple information is proposed.