Assessing Potentially Preventable Hospitalizations at the County Level: A Comparison of Measures Using Medicare Data and State Hospital Discharge Data.

This study examined the representativeness of the County Health Rankings and Roadmaps (CHR) measure of potentially preventable hospitalizations, which is derived from Medicare inpatient claims data, as an indicator of potentially preventable hospitalizations for adults aged ≥18 years. Potentially preventable hospitalizations were evaluated using rates of ambulatory care sensitive conditions (ACSCs). CHR rates of hospitalization for ACSCs based on Medicare data for 2010, Agency for Healthcare Research and Quality Prevention Quality Indicator #90 Overall Composite (PQI #90 Composite) rates of ACSCs based on hospital inpatient data for adults aged ≥18 years for 2011, and 2011 total mortality rates for adults aged ≥18 years for 212 counties in 3 US states were evaluated.