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Background The HMORN Virtual Data Warehouse (VDW) Utilization files are used in almost every VDW research project for a range of purposes including selecting study populations, building disease registries, measuring health status, and evaluating resource use and appropriateness of care. Utilization data, including encounter, diagnosis and procedure data, comes from multiple data sources including legacy data, electronic health records, and claims. Because the data come from many sources and require complicated processes of standardization, the VDW tables can be very complex to build, potentially leading to inconsistencies across sites. Our objective was to assess, document, and improve the overall quality, availability, and completeness of the VDW Utilization data. To understand whether our QA approach was effective, we compared the current data quality to quality assurance data collected in 2009. |
