Infant mortality rates in single, twin and triplet births, and influencing factors in Japan, 1995-98
Infant mortality rates in single, twin and triplet births, and influencing factors in Japan, 1995-98
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DOI：
10.1046/j.1365-3016.2001.00378.x
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发表时间：
2001-10-01
影响因子：
2.8
通讯作者：
Imaizumi, Y
中科院分区：
文献类型：
--
作者：
Imaizumi, Y
利用日本人口动态统计分析了1995年至1998年期间单胎、双胞胎和三胞胎出生的婴儿死亡率。本研究还探讨了多胞胎出生顺序和出生体重对新生儿综合死亡率的影响。新生儿死亡占婴儿死亡总数的比例，单胎约为1/2，双胞胎和三胞胎约为3/4。因此，为了减少FAR，在生命的第一个月对多胞胎进行重症监护可能非常重要。无论是单胎还是双胞胎，男性的IMR都高于女性，但三胞胎的情况并非如此。多胎相对于单胎的相对风险是双胞胎的5倍，三胞胎的12倍。第二胎的死亡率（每1000个活产18个）高于第一胎（每1000个活产16个），第三胎的死亡率（每1000个活产51个）高于第一胎（每1000个活产31个）和第二胎（每1000个活产34个）。二胎比头胎的风险更高可能与分娩并发症有关。在单胎、双胞胎和三胞胎中，随着出生体重的增加，IMR迅速下降。小于或等于1500克的IMRs为：单胎每1000例活产2.4例，双胞胎5.9例，三胞胎6.1例。相应的婴儿死亡率分别为75%、33%和10%。多胞胎的相对风险较高几乎完全是由于双胞胎和三胞胎的出生体重分布较低。为了降低IMR，出生体重是双胞胎、三胞胎和单胎的重要因素。在单胎、双胞胎和三胞胎中，新生儿早期死亡率随着胎龄的增加而下降。为出生体重
The infant mortality rate (IMR) was analysed among single, twin and triplet births during the period from 1995 to 1998 using Japanese Vital Statistics. This study also investigated the effects of order of multiple births and of birthweight on the IMR. Proportions of neonatal deaths among total infant deaths were about 1/2 for singletons and 3/4 for both twins and triplets. Thus, to reduce the FAR, intensive care of multiple births is likely to be very important during the first month of life. The IMR was higher in males than females for both singletons and twins, but not in triplets. Relative risks of the IMR in multiples relative to singletons were 5-fold in twins and 12-fold in triplets. The IMR was higher in the second-born (18 per 1000 live births) than the first-born (16) twin and higher in the third-born (51) than the first-born (31) and the second-born (34) triplet. The higher risk in the second-born than the first-born twin may be related to delivery complications. The IMR decreased rapidly as birthweight increased in singletons, twins, and triplets. IMRs for less than or equal to 1500 g were: 2.4 per 1000 live births in singletons, 5.9 in twins and 6.1 in triplets. The corresponding proportions of infant deaths were 75%, 33% and 10% respectively. The higher relative risks of multiple births are almost entirely the result of the lower birthweight distribution among twins and triplets. To reduce the IMR, birthweight is an important factor in twins, triplets and singletons. The overall early neonatal death rate decreased as gestational age rose in singletons, twins and triplets. For birthweights