Kaltreider D F, Johnson J W
Am J Obstet Gynecol. 1976 Feb 1;124(3):251-6. doi: 10.1016/0002-9378(76)90152-6.
A retrospective analysis of 8,839 singleton deliveries was undertaken to determine the relationships of maternal age, maternal hemoglobin concentrations, and past obstetric performance to the incidence of low-birth-weight (LBC) delivery. Patients under 19 years of age and patients with hemoglobin values less than 9.0 Gm. per 100 ml. were found to have significantly higher incidences of LBW deliveries. In addition, the incidence of LBW delivery was found to vary in proportion to the number of previous LBW deliveries and inversely with the number of previous term deliveries.
对8839例单胎分娩进行回顾性分析，以确定产妇年龄、产妇血红蛋白浓度和既往产科情况与低体重儿分娩发生率之间的关系。发现19岁以下的产妇和血红蛋白值低于每100毫升9.0克的产妇，其低体重儿分娩的发生率显著更高。此外，还发现低体重儿分娩的发生率与既往低体重儿分娩的次数成正比，与既往足月分娩的次数成反比。
