Comorbid conditions and outcomes after percutaneous coronary intervention

M. Singh, C. S. Rihal, V. L. Roger, R. J. Lennon, J. Spertus, A. Jahangir, D. R. Holmes

Research output: Contribution to journalArticlepeer-review

34 Scopus citations


Objective: To evaluate whether adding comorbid conditions to a risk model can help predict in-hospital outcome and long-term mortality after percutaneous coronary intervention (PCI). Design: Retrospective chart review Setting: Academic medical centre. Patients: 7659 patients who had 9032 PCIs. Interventions: PCI performed at Mayo Clinic between 1 January 1999 and 30 June 2004. Main outcome measures: The Mayo Clinic Risk Score (MCRS) and the coronary artery disease (CAD)-specific index for determination of comorbid conditions in all patients. Results: The mean (SD) MCRS score was 6.5 (2.9). The CAD-specific index was 0 or 1 in 46%, 2 or 3 in 30% and 4 or higher in 24%. The rate of in-hospital major adverse cardiovascular events (MACE) increased with higher MCRS and CAD-specific index (Cochran-Armitage test, p<0.001 for both models). The c-statistic for the MCRS for in-hospital MACE was 0.78; adding the CAD-specific index did not improve its discriminatory ability for inhospital MACE (c-statistic = 0.78; likelihood ratio test, p = 0.29). A total of 707 deaths after dismissal occurred after 7253 successful procedures. The c-statistic for all-cause mortality was 0.69 for the MCRS model alone and 0.75 for the MCRS and CAD-specific indices together (likelihood ratio test, p<0.001), indicating significant improvement in the discriminatory ability. Conclusions: Addition of comorbid conditions to the MCRS adds significant prognostic information for postdismissal mortality but adds little prognostic information about in-hospital complications after PCI. Such health-status measures should be included in future risk stratification models that predict long-term mortality after PCI.

Original languageEnglish (US)
Pages (from-to)1424-1428
Number of pages5
Issue number11
StatePublished - Nov 2008

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine


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