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Numerator

Heart attack patients who were prescribed an angiotensin converting enzyme inhibitor or angiotensin receptor blocker at hospital discharge

Denominator

Heart attack patients > 17 years of age with left ventricular systolic dysfunction and without contraindications to angiotensin converting enzyme inhibitors or angiotensin receptor blockers

Methodology

Hospital Compare sample rates were downloaded from the CMS web site: http://www.medicare.gov/Download/DownloadDB.asp

Hospital population weights were computed based on estimates imputed from the denominators for Hospital Compare readmissions. Hospital referral region (HRR) rates were computed as the weighted average of the hospital sample rates within the HRR using the population weights.

State rates were computed as weighted averages of the hospital sample rates within the state.

References

Hospital Compare process measures documentation posted at http://www.qualitynet.org/dcs/ContentServer?c=Page&pagename=QnetPublic%2FPage%2FQnetTier4&cid=1203781887871

HRR documentation is posted at http://www.dartmouthatlas.org/downloads/methods/geogappdx.pdf • SSA state and county code documentation is posted at County to CBSA crosswalk file