The influence of Elixhauser comorbidity index on percutaneous coronary intervention outcomes

Area of Science:

• Cardiology
• Health Services Research
• Medical Informatics

Background:

• Clinical outcomes related to evolving comorbidity burden in Percutaneous Coronary Intervention (PCI) patients are not well-documented.
• Assessing comorbidity's impact on PCI outcomes is crucial for patient management.

Purpose of the Study:

• To investigate the association between comorbidity burden and periprocedural outcomes in patients undergoing PCI.
• To analyze the impact of comorbidity on mortality, complications, length of stay, and costs in a large national cohort.

Main Methods:

• Utilized the National Inpatient Sample database for 6,601,526 PCI procedures from 2004-2014.
• Defined comorbidities using the Elixhauser Classification System (ECS) with 30 measures.
• Categorized patients into five groups based on ECS scores (0, 1-5, 6-13, ≥14) to assess outcomes.

Main Results:

• Patients with an ECS score >13 exhibited a fivefold increased odds of mortality (OR: 5.13) and major bleeding (OR: 11.46).
• Higher comorbidity burden was associated with doubled hospitalization costs compared to patients with lower burden.
• Significant associations were found between ECS categories and in-hospital mortality, periprocedural complications, and length of stay.

Conclusions:

• Elevated comorbidity burden (ECS >13) is a significant predictor of adverse outcomes post-PCI, including increased mortality, complications, and bleeding.
• ECS is a critical factor influencing length of stay and healthcare costs, doubling expenses for high-burden patients.
• Comorbidity assessment should be integrated into clinical decision-making for PCI patients to optimize care and predict outcomes.