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Public use data file documentation : 2006 inked birth/infant death cohort data set
  • Published Date:
    7/19/12
  • Language:
    English
Filetype[PDF-692.26 KB]


Details:
  • Description:
    This documentation is for the 2006 birth cohort linked birth/infant death data set (linked file). Previous birth cohort linked files were released for data years 1983-91. Beginning with 1995 data, the linked file was released in two different formats - period data and birth cohort data.

    Period data - The numerator for the 2006 period linked file consists of all infant deaths occurring in 2006 linked to their corresponding birth certificates, whether the birth occurred in 2005 or 2006. The denominator for this data set is all births occurring in 2006.

    Birth cohort data - The numerator of the 2006 birth cohort linked file consists of deaths to infants born in 2006 linked to their corresponding birth certificates, whether the death occurred in 2006 or 2007. The denominator for this data set is all births occurring in 2006.

    For most purposes, differences between the birth cohort and period linked files are negligible. However, birth cohort files are preferred for multivariate and some other types of detailed analysis because they follow a given cohort of births for an entire year to ascertain their mortality experience. This is generally considered to be a more robust methodology than the period file, which is essentially cross-sectional in nature.

    The 2006 birth cohort linked file includes several data files. The first file includes linked birth and death certificate data for all US infants born in 2006 who died before their first birthday - referred to as the numerator file. The second file contains information from the death certificate for all US infant death records which could not be linked to their corresponding birth certificates - referred to as the unlinked file. The third file is the 2006 NCHS natality file for the US with a few minor modifications - referred to as the denominator-plus file. These same three data files are also available for Puerto Rico, the Virgin Islands, and Guam. In addition, NCHS accepted a small number of late-filed birth records needed to link to infant deaths. This reduced the number of unlinked records and slightly increased the number of births in the denominator file.

    Publication with document properties.

    LinkCO06Guide.pdf

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