Linked Birth/Infant Death Data, 1991 Birth Cohort

<p>This data collection consists of three data files, which can be used to determine infant mortality rates. The first file provides linked records of live births and deaths of children born in the United States in 1991 (residents and nonresidents). This file is referred to as the "Numerator" file. The second file consists of live births in the United States in 1991 and is referred to as the "Denominator-Plus" file. Variables include year of birth, state and county of birth, characteristics of the infant (age, sex, race, birth weight, gestation), characteristics of the mother (origin, race, age, education, marital status, state of birth), characteristics of the father (origin, race, age, education), pregnancy items (prenatal care, live births), and medical data. Beginning in 1989, a number of items were added to the U.S. Standard Certificate of Birth. These changes and/or additions led to the redesign of the linked file record layout for this series and to other changes in the linked file. In addition, variables from the numerator file have been added to the denominator file to facilitate processing, and this file is now called the "Denominator-Plus" file. The additional variables include age at death, underlying cause of death, autopsy, and place of accident. Other new variables added are infant death identification number, exact age at death, day of birth and death, and month of birth and death. The third file, the "Unlinked" file, consists of infant death records that could not be linked to their corresponding birth records. (Source: downloaded from ICPSR 7/13/10)</p>
<p><strong>Please Note</strong>: This dataset is part of the historical CISER Data Archive Collection and is also available at ICPSR at <a href="https://doi.org/10.3886/ICPSR06629.v1">https://doi.org/10.3886/ICPSR06629.v1</a>. We highly recommend using the ICPSR version as they may make this dataset available in multiple data formats in the future.</p>

本数据集包含三个数据文件，可用于计算婴儿死亡率。第一个文件为1991年美国境内（含居民与非居民）出生儿童的活产与死亡关联记录，被称为"分子（Numerator）"文件。第二个文件为1991年美国活产数据，原称"分母（Denominator）"，后新增变量以优化处理流程，更名为"分母附加（Denominator-Plus）"文件。其收录的变量包括：出生年份、出生州与出生县、婴儿特征（胎龄、性别、种族、出生体重、妊娠期）、母亲特征（原籍、种族、年龄、受教育程度、婚姻状况、出生州）、父亲特征（原籍、种族、年龄、受教育程度）、妊娠相关项目（产前护理、活产数）及医学数据。自1989年起，美国标准出生证明新增多项内容，此次修订不仅重构了本系列关联文件的记录布局，还对关联文件做出了其他调整。此外，为便于数据处理，分子文件的部分变量被新增至分母文件中，该文件由此更名为"分母附加（Denominator-Plus）"文件。新增变量包括死亡年龄、根本死亡原因、尸检情况及事故发生地点；其他新增变量还有婴儿死亡标识号、精确死亡年龄、出生与死亡日期，以及出生与死亡月份。第三个文件为"未关联（Unlinked）"文件，收录了无法匹配到对应出生记录的婴儿死亡记录。（数据来源：2010年7月13日从ICPSR下载）

请注意：本数据集属于历史CISER数据档案馆藏，同时可在ICPSR获取，访问链接为https://doi.org/10.3886/ICPSR06629.v1。我们强烈建议使用ICPSR版本，该机构未来可能会推出该数据集的多种数据格式版本。