Malloy M H, Kao T C, Lee Y J
Division of Prevention Research, National Institute of Child Health and Human Development, Bethesda, Maryland.
Am J Public Health. 1992 Mar;82(3):448-50. doi: 10.2105/ajph.82.3.448.
We used vital statistics data to examine the effect of the time of entry into prenatal care relative to the gestational age of delivery on pregnancy outcome. Early entry into prenatal care was associated with better outcomes only in women who delivered at 37 through 42 weeks of gestation. We are concerned that the evaluation of the effect of prenatal care using vital statistics data may be questionable because of the problems inherent in the data.
我们使用生命统计数据来研究相对于分娩孕周的产前护理开始时间对妊娠结局的影响。仅在妊娠37至42周分娩的女性中，早期开始产前护理与更好的结局相关。我们担心，由于数据中存在的固有问题，使用生命统计数据评估产前护理的效果可能存在疑问。
