Linking the National Cardiovascular Data Registry CathPCI Registry with Medicare claims data: validation of a longitudinal cohort of elderly patients undergoing cardiac catheterization.


Journal Article

BACKGROUND: The National Cardiovascular Data Registry CathPCI Registry was recently linked with longitudinal Centers for Medicare & Medicaid (CMS) claims data. The degree to which this linked cohort is representative of the overall CathPCI Registry and CMS PCI populations is unknown. METHODS AND RESULTS: CathPCI Registry records were linked to CMS inpatient claims using indirect identifiers. We examined the degree to which hospitals and patients in the linked cohort are representative of the elderly (≥65 years) CathPCI Registry and CMS populations. From 2004 to 2006, 1492 hospitals filed CMS PCI claims and 663 contributed CathPCI Registry data. Of these hospitals, 643 (97%) were linked across data sources. Compared with all CMS PCI hospitals, the linked data set contained fewer governmental, northeastern, southern, and low-volume (<200 beds) sites. Among CMS beneficiaries, 993,351 PCI procedures were performed, including 398,508 (40.1%) at centers in the linked database. Of these, 341,916 (86%) were linked to CathPCI Registry records. Linked and unlinked CMS patients had similar demographic and clinical features. In the CathPCI Registry database, 477,456 elderly patients underwent PCI, with 359,077 (75%) linked to CMS claims. Linked and unlinked National Cardiovascular Data Registry patients were similar, except for less commercial or health maintenance organization insurance in the linked cohort. CONCLUSIONS: By using deterministic matching strategies, a large and representative cohort with detailed clinical data from the CathPCI Registry and longitudinal follow-up from CMS claims has been created.

Full Text

Duke Authors

Cited Authors

  • Brennan, JM; Peterson, ED; Messenger, JC; Rumsfeld, JS; Weintraub, WS; Anstrom, KJ; Eisenstein, EL; Milford-Beland, S; Grau-Sepulveda, MV; Booth, ME; Dokholyan, RS; Douglas, PS; Duke Clinical Research Institute DEcIDE Team,

Published Date

  • January 2012

Published In

Volume / Issue

  • 5 / 1

Start / End Page

  • 134 - 140

PubMed ID

  • 22253370

Pubmed Central ID

  • 22253370

Electronic International Standard Serial Number (EISSN)

  • 1941-7705

Digital Object Identifier (DOI)

  • 10.1161/CIRCOUTCOMES.111.963280


  • eng

Conference Location

  • United States