Beca J P, Wilson J, Toso A, Bloomfield J
Rev Chil Pediatr. 1989 Nov-Dec;60(6):341-5.
Specific mortality rates for birthweight (BW) and survival for gestational age were determined in babies under 1500 g and less than 34 weeks gestational age (GA), which were born in a private hospital at Santiago, Chile, between 1983 and 1988. Mortality rates were 875/1,000 in babies under 750 g, 391/1,000 for BW between 750 and 999 g, 185/1,000 for BW 1,000 to 1,249 g, and 125/1,000 in newborns who weighed 1,250 to 1,499 g. Survival increased with gestational age from 39% under 26 weeks to 57% at 26 and 27 weeks, reaching 83% at 28 and 29 weeks, 90% at 30 and 31 and 87% at 32 and 33 weeks. No significant difference was found neither in mortality nor in intracranial hemorrhage (ICH) incidence between newborns delivered by cesarean section or vaginal way. Survival of babies born after 26 weeks GA and weighing over 750 g was comparable with that reported by others. The type of delivery is not likely to play a role by itself in mortality or in incidence of severe ICH.
1983年至1988年间，在智利圣地亚哥的一家私立医院出生的1500克以下且胎龄小于34周的婴儿中，确定了出生体重（BW）的特定死亡率和胎龄存活率。750克以下婴儿的死亡率为875/1000，体重在750至999克之间的死亡率为391/1000，体重1000至1249克的死亡率为185/1000，体重1250至1499克的新生儿死亡率为125/1000。存活率随胎龄增加，从26周以下的39%升至26和27周时的57%，在28和29周时达到83%，在30和31周时为90%，在32和33周时为87%。剖宫产或阴道分娩的新生儿在死亡率和颅内出血（ICH）发生率方面均未发现显著差异。胎龄26周后出生且体重超过750克的婴儿存活率与其他人报告的相当。分娩方式本身不太可能在死亡率或严重ICH发生率中起作用。
