Miller H C
Am J Dis Child. 1983 Apr;137(4):323-7. doi: 10.1001/archpedi.1983.02140300005002.
A model is proposed for analyzing the many extextrinsic and intrinsic factors that might affect the incidence of low-birth-weight (LBW) infants (less than 2,501 g) adversely in populations of variable socioeconomic status (SES). The model provides for categorizing all mothers either into one of four broad categories of rinsic factors or into a normal group, free of all extrinsic factors. Application of the model in a prospective study of 972 infants showed that the incidence of LBW infants was low in normal pregnancies and significantly higher in the categories of extrinsic factors, that SES had a limited role in the birth of LBW infants, and that intrinsic factors had an almost negligible adverse effect if properly controlled.
提出了一个模型，用于分析在社会经济地位（SES）各异的人群中可能对低体重（LBW）婴儿（体重低于2501克）发病率产生不利影响的诸多外在和内在因素。该模型将所有母亲分为四大类内在因素类别之一或无所有外在因素的正常组。在一项对972名婴儿的前瞻性研究中应用该模型表明，正常妊娠中低体重婴儿的发病率较低，在外在因素类别中显著更高，SES在低体重婴儿出生中作用有限，并且如果得到适当控制，内在因素产生的不利影响几乎可以忽略不计。
