Zdeb M S
Am J Public Health. 1982 Jul;72(7):734-6. doi: 10.2105/ajph.72.7.734.
Postneonatal mortality among neonatal survivors and the distribution of age at death among infant deaths were examined for births occurring in upstate New York, 1968-1979. Postneonatal mortality rates increased among infants weighing 501-1500 grams. Infants weighing 1501-2000 grams experienced an increase in postneonatal mortality during the mid-1970s, later returning to the level of 1968. Among infants 2001+ grams, postneonatal mortality declined throughout the study period. Among all levels of birthweight, the proportion of infant deaths occurring as postneonatal deaths increased.
对1968年至1979年在纽约州北部出生的新生儿幸存者的新生儿后期死亡率以及婴儿死亡时的年龄分布进行了研究。体重在501至1500克之间的婴儿，其新生儿后期死亡率有所上升。体重在1501至2000克之间的婴儿在20世纪70年代中期新生儿后期死亡率有所上升，随后又回到了1968年的水平。在体重2001克及以上的婴儿中，整个研究期间新生儿后期死亡率都在下降。在所有出生体重水平中，作为新生儿后期死亡的婴儿死亡比例都有所增加。
