The United Network of Organ Sharing (UNOS) provided de-identified patient-level data from the Thoracic Registry (data source #110306-8). These data include all transplant recipients and donors in the U.S. reported to the Organ Procurement and Transplantation Network beginning October 10, 1987. Data entry by all US transplant centers was mandated by the 1984 National Transplantation Act.
Nationwide Inpatient Sample
The Nationwide Inpatient Sample (NIS) is the largest U.S. database of inpatient hospital stays that incorporates data from all payers, containing data from approximately 20% of U.S. community hospitals. Started in 1988 and continuing through the present, NIS collects information on a variety of data elements including diagnoses and procedures, severity adjustment elements (such as APR-DRGs and comorbidity indicators), admission and discharge status, payment source, hospital organizational characteristics, and more.
Thomson-Reuters Marketscan. The core databases, Commercial, Medicare Supplemental, and Medicaid, are huge - nearly 150 million patients since 1995. Longitudinal integrity is strong. Complete payment information is captured, both what the benefit plan and patient paid. Specialty pharmacy and mail order are included. And, specialty databases link claims to unique data sets such as productivity management, health risk assessment, dental, lab, medical records, and hospital data at the de-identified patient level. A separate hospital database allows for in-hospital research. The MarketScan white paper provides additional detail on individual MarketScan databases.