Skip to main content

Microdata for the United States and its Territories are included on separate files. The data for each set of the Perinatal Mortality Data Set consists of three separate data files.

  • Linked Deaths - The numerator file includes perinatal deaths which could be linked to a live birth.
  • Linked Births - The denominator file contains the live birth file.
  • Unlinked Deaths - The unlinked file contains information from the death certificate for all perinatal deaths which could not be linked to a corresponding birth certificate. 

The death data in both the numerator and unlinked files include the deaths of infants less than one year of age who died in the same calendar year as the birth data, regardless of the calendar year of their birth. The variable OUTCOME can be used to distinguish between infant deaths and fetal deaths.

Datasets located below are separated into two sections:

  • U.S. Data Files - Prior to 1972, data are based on a 50-percent sample of birth certificates from all States. Beginning in 1972, data are based on a 100-percent sample of birth certificates from some states and on a 50-percent sample from the remaining States. The number of States from which 100 percent of the records are used has increased from 6 in 1972 to all States and the District of Columbia in 1985.
  • U.S. Territory Data - Birth data from the U.S. Territories Guam, Puerto Rico, and the U.S. Virgin Islands are available on a separate file beginning in 1994. In 1998, American Samoa and the Northern Marianas were added to the U.S. Territories files.

Demographic data include variables such as 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 complications of labor and delivery. 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.

Other birth data available are Natality Data, Birth Cohort Linked Birth/Infant Death Data, and Matched Multiple Birth Data, 1995-1997.

CDC Wonder is a data extraction tool that can produce tables with counts of births occurring for select recent years within the United States to U.S. residents and non-residents. Counts can be obtained by state, county, child's gender and weight, maternal race, maternal age, maternal education, gestation period, prenatal care, and birth plurality.

Note: The use of this data signifies agreement with NCHS' 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)"

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

NBER internal users can access the data from a UNIX shell at /homes/data/perinatal or on an NBER PC via Network Neighborhood --> NBER --> home --> data --> perinatal

U.S.  Data Files - Linked Birth and Perinatal Mortality Data 

Year

Linked Deaths (Numerator Files)

Linked Births (Denominator Files)

Unlinked Deaths

1995 N95.zip, N95.sas D95.zip, D95.sas U95.zip, U95.sas
1996 N96.zip, N96.sas D96.zip, D96.sas U96.zip, U96.sas
1997 N97.zip, N97.sas D97.zip, D97.sas U97.zip, U97.sas
1998 N98.zip, N98.sas D98.zip, D98.sas U98.zip, U98.sas
1999 n99.zip, n99.sas d99.zip, d99.sas u99.zip, u99.sas
2000 n00.zip, n00.sas d00.zip, d00.sas u00.zip, u00.sas
2001 n01.zip, n01.sas d01.zip, d01.sas u01.zip, u01.sas
2002 n02.zip, n02.sas d02.zip, d02.sas u02.zip, u02.sas

U.S. Territory Data Files - Linked Birth and Perinatal Mortality Data

Year Linked Deaths (Numerator Files) Linked Births (Denominator Files) Unlinked Deaths
1995 Tn95.zip, Tn95.sas Td95.zip, Td95.sas Tu95.zip, Tu95.sas
1996 Tn96.zip, Tn96.sas Td96.zip, Td96.sas Tu96.zip, Tu96.sas
1997 Tn97.zip, Tn97.sas Td97.zip, Td97.sas Tu97.zip, Tu97.sas
1998 Tn98.zip, Tn98.sas Td98.zip, Td98.sas Tu98.zip, Tu98.sas
1999 tn99.zip, tn99.sas td99.zip, td99.sas tu99.zip, tu99.sas
2000 tn00.zip, tn00.sas td00.zip, td00.sas tu00.zip, tu00.sas
2001 tn01.zip, tn01.sas td01.zip, td01.sas tu01.zip, tu01.sas
2002 tn02.zip, tn02.sas td02.zip, td02.sas tu02.zip, tu02.sas

GENERAL DOCUMENTATION

 

MULTI-YEAR DOCUMENTATION

File Description 1995 1996 1997 1998 1999 2000 2001 2002
All files below, Pkzipped Peri95 Peri96 Peri97 Peri98 Peri99 Peri00 Peri01 Peri02
Introduction intro intro intro intro intro intro intro intro
List of Data Elements and Locations datael datael datael datael datael datael datael datael
Record Layout link link link link link link link link
Geographic Codes -- Description geo geo geo geo geo geo geo geo
Geographic Code Outline -- City city city city city city city city city
Geographic Code Outline -- County county county county county county county county county
Causes of Death

cdeath

cdeath

Linked Data Documentation Table 1 tab1 tab1 tab1 tab1 tab1 tab1 tab1 tab1
Linked Data Documentation Table 2 tab2 tab2 tab2 tab2 tab2 tab2 tab2 tab2
Linked Data Documentation Table 3 tab3 tab3 tab3 tab3 tab3 tab3 tab3 tab3
Linked Data Documentation Table 4 tab4 tab4 tab4 tab4 tab4 tab4 tab4 tab4
Linked Data Documentation Table 5 tab5 tab5 tab5 tab5 tab5 tab5 tab5 tab5
Linked Data Documentation Table 6 tab6 tab6 tab6 tab6 tab6 tab6 tab6 tab6
Fetal Death Documentation Table 1 fet1 fet1 fet1 fet1 fet1 fet1 fet1 fet1
Fetal Death Documentation Table 2 fet2 fet2 fet2 fet2 fet2 fet2 fet2 fet2
Fetal Death Documentation Table 3 fet3 fet3 fet3 fet3 fet3 fet3 fet3 fet3
Fetal Death Technical Appendix -- fdt fdt fdt fdt fdta fdta fdta
Technical Appendix -- Natality (files below for 1995-1996)

--

tan tan tan tan tan tan
Technical Appendix -- Mortality

tam

tam

tam

--

Addendum to Technical Appendix -- Mortality addmort addmort addmort addmort

--

Report on Infant Mortality Statistics rim95 rim96 rim97 rim98 rim99 rim00 rim01 rim02
Required State Fetal Death Reporting Dates

--

dates dates dates dates dates
Missing Data Report

--

miss miss miss miss miss
Contents Report cr95 cr96 cr97 cr98 cr99 cr00 cr01 cr01

 

Related

Topics

More from NBER

In addition to working papers, the NBER disseminates affiliates’ latest findings through a range of free periodicals — the NBER Reporter, the NBER Digest, the Bulletin on Retirement and Disability, and the Bulletin on Health — as well as online conference reports, video lectures, and interviews.

Economics of Digitization Figure 1
  • Article
The NBER Economics of Digitization Project, established in 2010 with support from the Alfred P. Sloan Foundation, provides a forum for disseminating research...
claudiagoldinpromoimagelecture.png
  • Lecture
Claudia Goldin, the Henry Lee Professor of Economics at Harvard University and a past president of the American...
2020 Methods Lecture Promo Image
  • Lecture
The extent to which individual responses to household surveys are protected from discovery by outside parties depends...