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随访研究中产后闭经时长选择偏差的调整AI 解读

In a prospective study in which females giving birth in a specified small interval of time are followed to obtain the distribution of the duration of postpartum amenorrhea (PPA), the observed distribution involves a selection bias because of an overrepresentation of smaller PPA. In this article, the nature of this selection bias is investigated and an analytical procedure is outlined to adjust the observed distribution of PPA in order to obtain the true distribution. The…

随访研究中产后闭经时长选择偏差的调整AI 解读

In a prospective study in which females giving birth in a specified small interval of time are followed to obtain the distribution of the duration of postpartum amenorrhea (PPA), the observed distribution involves a selection bias because of an overrepresentation of smaller PPA. In this article, the nature of this selection bias is investigated and an analytical procedure is outlined to adjust the observed distribution of PPA in order to obtain the true distribution. The…

每对夫妇生育次数差异的随机机制AI 解读

Under certain assumptions a probability distribution for the variation in the number of births per couple has been derived. The distribution involves several parameters. A procedure to find the B.A.N. [best asymptotically normal] estimates of the parameters is outlined. One example of the application of the distribution is discussed in some detail.

每对夫妇生育次数差异的概率模型AI 解读

Under certain assumptions two probability distributions for the variation in the number of births per couple are derived. A procedure to find the B.A.N. (Best Asymptotically Normal) estimates of the parameters of the first model is outlined. The distribution is applied to two examples.