Development of Post-Acute Care Supplement (PACS) Research Files
PACs Research Files
Purpose: To support comparative effectiveness research (CER) on patients with multiple chronic conditions who receive Medicare and Medicaid-funded post-acute care.
Scope: This project creates post-acute care supplement (PACS) files for patients receiving Medicare and Medicaid-funded post-acute care using two Centers for Medicare & Medicaid Services (CMS) administrative data sets. These files supplement current utilization-based quality measures with measures of patient functional status, psychosocial well-being, cognitive impairment, communication difficulties, and vital care processes including medication management.
Methods: Using two CMS assessment data files—the Minimum Data Set (MDS) for nursing home care, and the Outcome and Assessment Information Set (OASIS) for home health care—SPHERE created two longitudinal files with one observation per person per year. These files—named the OASIS Annual Summary File (OASF) and Long-term care Annual Summary File (LTCASF)—are structured to be easy-to-use for researchers across a variety of disciplines and are readily linkable to other CMS administrative sources.
Results: Using the 2000-2010 OASF file, we determined that home health utilization rose fastest for black and Hispanic Medicare beneficiaries and for Medicare beneficiaries in Texas, Oklahoma, and Louisiana. Although functional status has not changed for most Medicare beneficiaries, the functional status for disabled Medicare beneficiaries under 35 has improved over the last 10 years.
List of Publications and Products: None
EHR/EMR System or Vendor
Post-Acute Care Supplement (PACS) datasets: 1) OASIS Annual Summary File (OASF) and Long-term Care Annual Summary File (LTCASF) created from the CMS Outcome and Assessment Information Set (OASIS) and Minimum Data Set (MDS) assessment files, respectively
Geographic scope type
Locations of Focus
Population Network Size
Not applicable. This project involved the creation of new data files from existing Centers for Medicare and Medicaid administrative files.
Please see "additional information" below.
CER/PCOR Study Priority Populations
Individuals with disabilities, Individuals who need chronic care
Outcome(s) of Interest
Create data files to supplement current utilization-based quality measures with measures of patient functional status, psychosocial well-being, cognitive impairment, communication difficulties, and vital care processes including medication management.
Acknowledgement of Funders
The SPHERE Institute and Acumen, LLC thank the Agency for Healthcare Research and Quality (AHRQ) for their generous support of this project.