Structure of AHRQ QI
- Definitions based on
- ICD-9-CM* diagnosis and procedure codes
- Often along with DRG, MDC, sex, age, procedure dates, admission type, admission source, discharge disposition, discharge quarter (new)
- Numerator is the number of cases "flagged" with the outcome of interest (e.g., postoperative sepsis, avoidable hospitalization for asthma, death)
- Denominator is the population at risk (e.g., pneumonia patients, elective surgical patients, county population from census data)
- The observed rate is numerator/denominator
- Volume counts for selected procedures
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