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本文目的是研究早产的流行病学,主要是比较胎龄(GA)为不足月(在妊娠20～37周之间)出生体重(BW)也不够(在500～2,500gm之间)的早产儿(P-LB),与出生体重虽不够(在500～2,500之间)但妊娠日期在37周以上的新生儿(T-LBW)的流行病学、也就是鉴别早产低体重儿与发育迟缓的低体重儿的流行因素。本材料来自产科统计合作中心计算机库(OSC)1970～1976年对240,474次分娩的分析。比较此材料中P-LBW与T-LBW之婴儿死亡率,提示较单纯用出生体重分析能更好的鉴别危险因素的差异。P-LBW死亡率几乎是T-LBW的5倍。
The purpose of this paper is to study the epidemiology of preterm labor, primarily to compare premature infants with gestational age (GA) between months 20 and 37 who have insufficient birth weight (BW) between 500 and 2,500 gm (P-LB), and the neonatal (T-LBW) epidemiology of birth weight not enough (between 500 and 2,500) but with a gestational age of 37 weeks or more, that is, identifying the prevalence of preterm low birth weight and stunting Prevalence of low birth weight children. This material was derived from an analysis of 240,474 deliveries from 1970 to 1976 at the Obstetrics and Gynecology Statistics Collaborative Computing Center (OSC). Comparing the infant mortality rates of P-LBW and T-LBW in this material suggests that differences in risk factors can be better identified using birth-weight analysis alone. P-LBW mortality is almost five times that of T-LBW.