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2003 National Healthcare Quality Report

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Hospital admissions for immunization-preventable influenza per 100,000 population.

Measure Source

Agency for Healthcare Research and Quality (AHRQ) Prevention Quality Indicators (added specifically for National Healthcare Quality Report).


1.72 Immunization-preventable influenza admissions for elderly (excluding transfers from other institutions) per 100,000 patients age 65 years and older, by patient and hospital characteristics, 2000.

Data Source

Agency for Healthcare Research and Quality, Center for Delivery, Organization, and Markets, Healthcare Cost and Utilization Project (HCUP). Nationwide Inpatient Sample.


U.S. population age 65 and over.


Non-maternal discharges age 65 and over with any diagnosis of immunization-preventable influenza (ICD-9-CM codes 487.0, 487.1, and 487.8), excluding transfers from other institutions.


Rates are adjusted by age and sex, using the year 2000 U.S. population age 65 and over as the standard population.

Although not all states participate in the HCUP database, it is weighted to give national estimates using weights based on all U.S. community, non-rehabilitation hospitals in the American Hospital Association Annual Survey of Hospitals.

This measure is not included in the AHRQ Prevention Quality Indicators software available on the AHRQ Web site.

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