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NIS Description of Data Elements
The NIS is set of longitudinal hospital inpatient databases included in the HCUP family. These databases are created by AHRQ through a Federal-State-Industry partnership.
 
 
HOSP_BEDSIZE - Bedsize of hospital
 
Documentation Sections:
General Notes
Uniform Values
State Specific Notes
General Notes
 

Bedsize categories are based on hospital beds, and are specific to the hospital's location and teaching status. Bedsize assesses the number of short-term acute beds in a hospital. Hospital information was obtained from the AHA Annual Survey of Hospitals.

Beginning in 1998, the hospital's bedsize categories are defined using region of the U.S., the urban-rural designation of the hospital, in addition to the teaching status. Rural hospitals were not split according to teaching status, because rural teaching hospitals were rare. A hospital is considered to be a teaching hospital if it has an AMA-approved residency program, is a member of the Council of Teaching Hospitals (COTH) or has a ratio of full-time equivalent interns and residents to beds of .25 or higher. The classification of a hospital location as urban or rural has changed over time. Prior to 2004 data, the urban/rural designation was based on Metropolitan Statistical Areas (MSA). Beginning with the 2004 data, this designation was determined by the Core Based Statistical Area (CBSA). This change in 2004 contributed to a slight decline in the number of hospitals that were classified as rural and a corresponding increase in the number of hospitals that were classified as urban.

BEDSIZE CATEGORIES (Beginning in 1998)
Location and Teaching Status Hospital Bedsize
Small Medium Large
NORTHEAST REGION
Rural 1-49 50-99 100+
Urban, nonteaching 1-124 125-199 200+
Urban, teaching 1-249 250-424 425+
MIDWEST REGION
Rural 1-29 30-49 50+
Urban, nonteaching 1-74 75-174 175+
Urban, teaching 1-249 250-374 375+
SOUTHERN REGION
Rural 1-39 40-74 75+
Urban, nonteaching 1-99 100-199 200+
Urban, teaching 1-249 250-449 450+
WESTERN REGION
Rural 1-24 25-44 45+
Urban, nonteaching 1-99 100-174 175+
Urban, teaching 1-199 200-324 325+

Prior to 1988, the bedsize category did not vary by region and teaching hospitals were defined as having an AMA approved residency program or having membership in the Council of Teaching Hospitals.

BEDSIZE CATEGORIES (Prior to 1998)
Location and Teaching Status Hospital Bedsize
Small Medium Large
Rural 1-49 50-99 100+
Urban, nonteaching 1-99 100-199 200+
Urban, teaching 1-299 300-499 500

In the 1988-1992 NIS, the hospital's bedsize category was stored in the variable ST_BEDSZ. In the 1993-1997 NIS, this same information is stored in the variable H_BEDSZ. Beginning with the 1998 NIS, the name HOSP_BEDSIZE is used.

For detailed information about the NIS sampling design, see the year-specific report on the Design of the HCUP Nationwide Inpatient Sample.

HOSP_BEDSIZE is missing if the data source that contributed discharge data to the NIS prohibits the release of hospital identifiers.

 
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Uniform Values
VariableDescriptionValueValue Description
HOSP_BEDSIZEBedsize of hospital1Small
2Medium
3Large
.Missing
 
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State Specific Notes
None
 
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Internet Citation: HCUP NIS Description of Data Elements. Healthcare Cost and Utilization Project (HCUP). September 2008. Agency for Healthcare Research and Quality, Rockville, MD. www.hcup-us.ahrq.gov/db/vars/hosp_bedsize/nisnote.jsp.
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Last modified 9/17/08