Martinez G A, Stahle D A
Am J Public Health. 1982 Jan;72(1):68-71. doi: 10.2105/ajph.72.1.68.
The type of milk fed infants from birth to six months of age was ascertained by quarterly surveys of a national sample of births. WIC (Women, Infants and Children Program) participants were identified from this sample, and trend data indicate that an increased percentage of WIC mothers ae choosing to breastfeed their infants. Infant formula use has declined in the early months of life, but increased at the expense of cow's milk toward the middle of the first year.
通过对全国出生样本进行季度调查,确定了出生至6个月大婴儿所食用的牛奶类型。从该样本中识别出参加妇女、婴儿和儿童营养补充计划(WIC)的人员,趋势数据表明,选择母乳喂养婴儿的WIC母亲比例有所增加。婴儿配方奶粉的使用在生命早期有所下降,但在第一年中期以牺牲牛奶为代价而增加。