Yu V Y, Bajuk B, Cutting D, Orgill A A, Astbury J
Br J Obstet Gynaecol. 1984 Jul;91(7):633-9. doi: 10.1111/j.1471-0528.1984.tb04822.x.
The hospital survival rate was 47% in 111 inborn infants who weighed 501-1000 g and 90% in 211 who weighed 1001-1500 g. The survival rate after caesarean birth was significantly higher than that after vaginal delivery in the 1001-1500 g group but not in the 501-1000 g group. At 2 years of age, 73% of survivors born at 501-1000 g and 85% of those born at 1001-1500 g had no neurological or developmental disability; no significant difference was found between caesarean and vaginal births. The mode of delivery did not significantly affect survival or late outcome of the 192 singleton infants with cephalic presentation. Although the survival rate was not significantly different between infants with breech and cephalic presentations, the former had a significantly higher disability rate. Within the group of 72 singleton infants with breech presentation, the survival rate after caesarean birth was significantly higher than after vaginal delivery in the 1001-1500 g group but not in the 501-1000 g group. No significant difference in late outcome was found between caesarean and vaginal births in this subgroup.
111名体重在501至1000克之间的先天婴儿的医院存活率为47%，211名体重在1001至1500克之间的婴儿的存活率为90%。在体重1001至1500克的婴儿组中，剖宫产术后的存活率显著高于阴道分娩后的存活率，但在体重501至1000克的婴儿组中并非如此。在2岁时，体重501至1000克的存活婴儿中有73%、体重1001至1500克的存活婴儿中有85%没有神经或发育残疾；剖宫产和阴道分娩之间未发现显著差异。分娩方式对192名单胎头先露婴儿的存活或远期结局没有显著影响。尽管臀先露和头先露婴儿的存活率没有显著差异，但前者的残疾率显著更高。在72名单胎臀先露婴儿组中，体重1001至1500克的婴儿剖宫产术后的存活率显著高于阴道分娩后的存活率，但在体重501至1000克的婴儿组中并非如此。在该亚组中，剖宫产和阴道分娩的远期结局没有显著差异。
