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AHCPR Unveils New Inpatient Data Product
Press Release Date: April 29, 1996
The Agency for Health Care Policy and Research today announced
the availability of its Nationwide
Inpatient Sample (NIS) Release
2 containing 1993 data on hospital inpatient care,
services and costs.
The NIS consists of 6.5 million patient records from a
geographically dispersed sample of 900 community hospitals in 17
States. NIS Release 2 and NIS Release 1—issued by AHCPR
year and containing inpatient data from hospitals in 11 States
from 1988 to 1992—form the largest, most powerful source of
hospital discharge-level information in the United States. NIS
Release 2 consists of a set of six CD-ROMs that are designed to
be run on desktop computers.
The data will prove useful to both public- and private-sector
organizations interested in hospital care. NIS Release 1 data,
for example, have been used to compare services and other
information within managed care organizations and hospital chains
with national data; to prioritize strategies for product
development by studying conditions treated in hospitals; and to
determine the costs of treating specific conditions. Among those
who have ordered NIS Release 1 data are health insurance
companies, managed care organizations, hospitals, health care
consultants, pharmaceutical manufacturers, medical device
companies, trade associations, special-interest groups, State
government agencies and medical schools.
NIS Release 2 contains hospital identifiers so that users can
obtain detailed information on individual hospitals by linking
the data with the American Hospital Association's Survey of
Hospitals. In addition, users can obtain county-level
information, such as the availability of medical personnel and
services, by linking the NIS data to the Bureau of Health
Professions' Area Resource File. Weights included in the NIS
data allow users to produce national estimates.
NIS Release 2 includes information on more than 100 variables,
such as patient demographic characteristics, diagnoses and
procedures, admission and discharge status, length of stay,
expected pay source and total charges. To protect privacy, data
elements that could directly or indirectly identify individual
patients and physicians are excluded. Hospital-level information
includes the name and address of the facility, teaching status,
rural or urban location, type of ownership and size.
The NIS databases and companion State Inpatient Database were
developed as part of AHCPR's Healthcare Cost and Utilization
Project (HCUP-3) through a public-private partnership with State
governments and hospital associations.
The HCUP-3 Nationwide Inpatient Sample Release 2 (PB96-501325)
is available from the National Technical Information Service
(NTIS), 5285 Port Royal Road, Springfield, Va. 22161; tel: (703)
605-6000 or 800-553-6847. The set of six CD-ROMs comes in ASCII format and sells
for $160. The set includes documentation in Adobe® Acrobat® (a
Windows® Reader™ is provided) and NIS tools (including load
programs for SAS and SPSS). NIS Release 1 (PB95-503710) is
available on a set of 26 CD-ROMs and sells for $300.
Users must sign and return a Data Use Agreement supplied by NTIS
before either set will be shipped. Users must agree to use the
data for research and aggregate statistical reporting, to make no
attempt to identify individuals, and to not identify hospitals in
disseminated or published materials.
For more information on HCUP-3, contact email@example.com
For additional information, contact AHCPR Public Affairs: or Salina Prasad, (301) 427-1864.