Hicks L E, Langham R A
Public Health Rep. 1985 Nov-Dec;100(6):656-62.
Cognitive data were obtained on 19 of the 21 pairs of siblings who had been in the authors' earlier study of behavioral outcomes associated with participation in the Special Supplemental Food Program for Women, Infants, and Children (WIC). The timing of WIC participation differed for the members of the sibling pairs, beginning in the perinatal period for one sibling and after 1 year of age for the other. The perinatally supplemented siblings received WIC services for an average of 22 months longer than the siblings whose supplementation began at 1 year of age. The present study determined that enhancements in IQ scores proved stable on blind retesting 32 months after the original study, with those siblings who were supplemented perinatally (and for a longer duration) continuing to exhibit higher scores. The group differences in school grade point averages were in the expected direction at followup, but fell short of statistical significance.
在作者早期一项关于参与妇女、婴儿和儿童特别补充食品计划（WIC）相关行为结果的研究中，对21对兄弟姐妹中的19对获取了认知数据。兄弟姐妹对中的成员参与WIC的时间不同，一个兄弟姐妹从围产期开始，另一个在1岁以后开始。围产期接受补充的兄弟姐妹比1岁开始补充的兄弟姐妹平均多接受22个月的WIC服务。本研究确定，在原始研究32个月后的盲法复测中，智商分数的提高被证明是稳定的，那些围产期接受补充（且时间更长）的兄弟姐妹继续表现出更高的分数。随访时，学校平均绩点的组间差异符合预期方向，但未达到统计学显著性。
