NATIONAL BUREAU OF ECONOMIC RESEARCH
NATIONAL BUREAU OF ECONOMIC RESEARCH

NCHS's Vital Statistics Birth Cohort Linked Birth/Infant Death Data, 1983-1991, 1995-2006

This page contains the NBER collection of Birth Cohort Linked Birth and Infant Death Data of the National Vital Statistics System of the National Center for Health Statistics. The microdata for each year of the Linked Birth/Infant Death Data Set consist of three separate data files. The denominator files (such as Den85.dat.Z) contain all births occuring in a given calendar year. The numerator files (such as Num85.dat.Z) include deaths to all infants born in that same calendar year for which the death certificate can be linked to a birth certificate in the denominator file. The unlinked files (such as Unl85.dat.Z) include death certificate information for all the infant deaths that cannot be linked to a birth in the corresponding birth file. The numerator/denominator set can be used to compute infant mortality rates.

Demographic data include variables such as date of birth, age and educational attainment of parents, marital status, live-birth order, race, sex, and geographic area. Health data include items such as birth weight, gestation, prenatal care, attendant at birth, and Apgar score. Geographic data includes state, county, and city of mother's residence and state and county of the place of birth. City and county data are available only for areas with a population of 250,000 or more. Check the documentation below for more detail.

Other birth data availble are Natality Data, 1968-2006, Period Linked Birth/Infant Death Data, 1995-2002, as part of the Perinatal Mortality Data, and Matched Multiple Births Data, 1995-1998. *** NCHS did not produce Linked Birth/Infant Death from 1992-1994. After 1999, the Linked Birth/Infant Death data is included as part of the Perinatal Mortality Data set.

SEER provides helpful U.S. Population data for 1969 on.

By using this data you signify your agreement with NCHS's data use rules. Works referring to the datasets or codebooks should contain a citation to NCHS. Published material derived from this data should include a citation such as this at the bottom of the table: "Source: National Center for Health Statistics (span of years used)"

The ".zip" files can be uncompressed with winzip. To check your ability to uncompress these files, download the small file compress.zip. These files give an example of how to read in .Z and .zip ASCII files into SAS for UNIX without decompressing the files. To download files in Internet Explorer, right click on them and select "Save Target As...".

Updates and changes.



Data

All U.S. Raw Data Files
PDF Doc
Linked Deaths
Births
Unlinked Deaths
All U.S. Terr Raw Data Files
Linked Deaths
Births
Unlinked Deaths
Raw SAS Stata CSV Raw SAS Stata CSV Raw SAS Stata CSV Raw SAS Stata CSV Raw SAS Stata CSV Raw SAS Stata CSV
2006 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2005 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2004 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2003 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2002 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2001 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
2000 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
1999 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
1998 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
1997 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
1996 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
1995 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv PS.zip num dat num sas num dta num csv den dat den sas den dta den csv unl dat unl sas unl dta unl csv
NCHS did not produce Linked Birth/Infant Death Files from 1992-1994
1991 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
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1990 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1989 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1988 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1987 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1986 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1985 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1984 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
1983 US.zip pdf num dat num sas num dta num csv den dat den sas den dta den csv
File size: The compressed 1983-1988 Den files are about 60 Mb, Num, 20 Mb, and Unl 30 Kb. The compressed 1989-1991 and 1998-1999 Den files are about 130 Mb, Num 2 Mb, and Unl 30 Kb. The compression ratio for these files is over 90%.
The 2003 denominator uncompressed file size is greater than 2Gb so use decompression software that can handle it. NBER internal users can access the data from a UNIX shell at /homes/data/lbid or on an NBER PC via Network Neighborhood --> NBER --> home --> data --> lbid


SAS, Stata, SPSS Data Definition Files

These SAS, Stata, and SPSS files were created by Jean Roth at the NBER to make access to the NCHS' Linked Birth/Infant Death Data easier to use.
 
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SPSS
.dct
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2006 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2005 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2004 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2003 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2002 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2001 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
2000 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1999 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1998 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1997 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1996 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1995 num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps num sas num do num dct num sps den sas den do den dct den sps unl sas unl do unl dct unl sps
1991 num sas num do num dct num sps den sas den do den dct den sps
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1990 num sas num do num dct num sps den sas den do den dct den sps
1989 num sas num do num dct num sps den sas den do den dct den sps
1988 num sas num do num dct num sps den sas den do den dct den sps
1987 num sas num do num dct num sps den sas den do den dct den sps
1986 num sas num do num dct num sps den sas den do den dct den sps
1985 num sas num do num dct num sps den sas den do den dct den sps
1984 num sas num do num dct num sps den sas den do den dct den sps
1983 num sas num do num dct num sps den sas den do den dct den sps


 

To report errors, or if you have comments or suggestions, e-mail jroth@nber.org.

Last Update: February 10, 2014 Created by Jean Roth August 10, 2000

 
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