STUDY VITAMIN SUPPLEMENTATION AND NEURAL TUBE DEFECTS

确定是否在服用维生素/叶酸补充剂前后 受孕降低了生下患有神经管缺陷的婴儿的风险。 这将通过病例对照研究来实现。流行病学和 美国国家儿童健康研究所生物统计学研究计划(EBRP) 和人类发展组织(NICHD)将设计一项采访妇女的协议 他们生下了一个神经管缺陷的孩子并进行了适当的控制 研究对象。选定的承包商将确定上述女性的位置， 进行访谈，并将收集到的数据传输给数据 协调中心。

Determine whether the use of vitamin/folate supplements around the time of conception reduces the risk of producing an infant with neural tube defects. This will be accomplished by a case-control study. The Epidemiology and Biometry Research Program (EBRP) of the National Institute of Child Health and Human Development (NICHD) will design a protocol for interviewing women who have produced a child with a neural tube defect and appropriate control subjects. The selected contractors will locate the aforementioned women, conduct the interviews, and transmit the data collected to the Data Coordinating Center.