目的:在试验第一阶段的36个月内,采用传统洗手法(HW)接生超低出生体重儿;随后的第二阶段36个月内,采用酒精擦手与佩戴手套法(HR)接生;对上述两种情况下新生儿迟发性感染与坏死性小肠结肠炎的发病率进行比较研究。方法:统计1993年12月至1999年11 OBJECTIVE: In the 36 months of the first phase of the trial, a child was born with a low birth weight by conventional handwashing method (HW) The incidence of neonatal late-onset and necrotizing enterocolitis in these two cases was compared. Methods: Statistics December 1993 to November 1999