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Numerator

All non-maternal discharges with ICD-9-CM procedure code for lower extremity amputation in any field and diagnosis code of diabetes in any field

Denominator

Medicare beneficiaries with full fee-for-service coverage for 12 months

Methodology

Prevention Quality Indicators (PQI) version 4.3 software was downloaded from the Agency for Healthcare Research and Quality web site - http://www.qualityindicators.ahrq.gov/Software/Default.aspx and used to calculate this PQI quality measure rate (observed).

Zip code rates were aggregated to hospital referral region (HRR) rates by summing numerators and denominators for beneficiary zip codes within the HRR.

State rates were calculated by summing numerators and denominators of the zip code rates within the state.

Beneficiary age group (< 65, 65-74, and 75+ ) was determined using the age of the individual at the end of the reference year or the individual's age at the time of death.

References

Prevention Quality Indicators (PQI) version 4.1a software is posted on the Agency for Healthcare Research and Quality web site - http://www.qualityindicators.ahrq.gov/Software/Default.aspx

HRR documentation is posted at http://www.dartmouthatlas.org/downloads/methods/geogappdx.pdf

SSA state code documentation is posted at County to CBSA crosswalk file