The American Hospital Association Annual Survey Database
Study Number	S20_9900
Background of Dataset
Purpose of the Data Set	Hospitals in the U.S. are surveyed by the AHA each year to provide data for researchers and managers.
Criteria(s) for Inclusion/Exclusion
Age Range Included	N/A
Method(s) of Data Gathering	Written survey
Sampling Frame/Design
Limitation(s) of Study	Response rate is 82%, missing data are imputed from previous responses or from institutions with similar characteristics
Year(s) Available	1999, 2000
Number of Observations	6044 in 2000
Unit of Observation	Hospital
Publisher	American Hospital Association
Contact Information/Web Address	http://www.ahadata.com
Condition of Use
Contents of Database
Key Linking Variables
•Patient identifier
•Physician identifier
•Health facility identifier	AHA ID, Name
•Geographic identifier	County, City, State
•Other identifier
Demographics Information	N/A
Access/Utilization Information
Unit of Utilization	Hospital
Source of Information
•Self reported
•Parent
•Medical provider	Yes
•Billing/encounters
•Other source
Health Insurance Information	Number of Medicare and Medicaid discharges
Health Care Utilization
>Type
1) Outpatient
•Date of visits
•Number of visits	Yes
•Referrals information
•Specialty visits
•Other outpatient utilization
2) Inpatient
•Admission/discharge dates
•Number of admissions	Yes
•Length of stay
•Admission status (transfer, ER      admissions...etc)
•Discharge status
•Other information	Inpatient days
3) Emergency room
•Date of visits
•Number of visits
•Other information
4) Pharmacy
•Date of prescription
•Drug information
•Other information
5) Other utilization
•Home care services
•Long term care
•Other services
>Medical Codes	N/A
Health Care Facility Information
•Location	Yes, by city, state, county
•Number of beds	Yes
•Number of MDs	Yes
•Other information	Detailed information about services provided, number of employees by categories, ownership, membership in health care system.
Physician Information	N/A
Cost/Expenditure Information
•Unit of cost	Hospital
•Charges/costs/payments
•Total	Expenese by category, e.g., payroll, benefits.
•Allied and additional services
•Pharmacy
•Out-of-pocket payments
•Other information
Other Information
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