Lambert D A, Strauss L T
Public Health Rep. 1987 Mar-Apr;102(2):200-4.
The National Infant Mortality Surveillance (NIMS) project used linked birth and infant death certificates to calculate birth weight-specific infant mortality risks for the 1980 U.S. birth cohort. Record linkage depends on complete registration of vital events, interstate exchange of vital records, accurate information on certificates, and a comprehensive linkage system. States reported 2,604 unlinked infant death certificates for 1980, ranging from 0 to 397 per State. Age at death for these infants ranged from 1 minute to 11 months. More than 41 percent of the unlinked death certificates were for postneonates, compared with 32.5 percent found in the cohort's total infant death experience. Only 38.2 percent of the unlinked infant death certificates showed strictly intrastate events (birth and death occurrence, and residence at death all in one State), compared with 92.9 percent in the cohort's total infant death experience. Estimates of the percentage successfully linked by State ranged from 86.0 to 100.0. After adjusting for the certainly unlinked infant death certificates, nine States' infant mortality risks increased by more than 0.2 per 1,000 live births. Improvements are needed both within and between States to ensure more complete birth and infant death certificate linkage.
国家婴儿死亡率监测（NIMS）项目利用关联的出生证明和婴儿死亡证明，计算了1980年美国出生队列中按出生体重划分的婴儿死亡风险。记录关联依赖于生命事件的完整登记、生命记录的州际交换、证明上的准确信息以及一个全面的关联系统。各州报告了1980年2604份未关联的婴儿死亡证明，每个州的数量从0到397不等。这些婴儿的死亡年龄从1分钟到11个月不等。超过41%的未关联死亡证明是关于晚期新生儿的，而在该队列的婴儿总死亡情况中这一比例为32.5%。只有38.2%的未关联婴儿死亡证明显示的是严格的州内事件（出生和死亡发生地以及死亡时的居住地均在一个州内），而在该队列的婴儿总死亡情况中这一比例为92.9%。各州成功关联比例的估计值在86.0%至100.0%之间。在对肯定未关联的婴儿死亡证明进行调整后，9个州的婴儿死亡风险每1000例活产增加了0.2以上。州内和州际都需要改进，以确保出生证明和婴儿死亡证明更完整地关联。
