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Numerator

All non-maternal discharges with ICD-9-CM principal diagnosis code for asthma

Denominator

Count of Medicare FFS beneficiaries

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).

Medicare FFS beneficaries limited to those who (a) have no months of HMO enrollment and (b) have both Part A and Part B for whatever portion of the year that they are covered by FFS Medicare (i.e., they have no months of A-only or B-only coverage).

Beneficiary age group (< 40) 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.

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.

References

Prevention Quality Indicators (PQI) version 4.3 software is posted on the Agency for Healthcare Research and Quality web site - Prevention Quality Indicators (PQI) version 4.3 software

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