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Numerator

Heart attack patients who received aspirin within 24 hours before or after hospital arrival

Denominator

Heart attack patients > 17 years of age without aspirin contraindications

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