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Administrative hospitalization database validation of cardiac procedure codes
Douglas S Lee1, Audra Stitt, Xuesong Wang
1Institute for Clinical Evaluative Sciences, Toronto, ON, Canada M4N3M5. dlee@ices.on.ca
Insights
Administrative data accurately codes cardiac procedures like PCI and CABG surgery. This validation supports using these databases for tracking cardiovascular interventions.
Area of Science:
- Cardiovascular medicine
- Health informatics
- Health services research
Background:
- Cardiac procedures are vital for cardiovascular disease treatment but incur significant costs.
- Administrative data offers a potential avenue for tracking these procedures, yet requires validation against clinical registries.
- Previous research has not sufficiently validated administrative data sources for cardiac procedure tracking.
Purpose of the Study:
- To assess the accuracy of cardiac procedure coding within administrative databases compared to a prospective clinical registry.
- To determine the reliability of the Canadian Institute for Health Information (CIHI) database for capturing cardiac procedures.
Main Methods:
- A comprehensive analysis of 182,018 cardiac procedures (PCI, CABG surgery, valve surgery, cardiac catheterization) across 18 Ontario centers during fiscal years 2005-2006.
- Comparison of coding accuracy between the CIHI administrative database and the Cardiac Care Network clinical registry.
- Calculation of positive predictive values (PPVs) for various cardiac procedures.
Main Results:
- High positive predictive values (PPVs) were observed for cardiac procedures in the CIHI database: 97% for CABG surgery, 96% for valve surgery, 94% for PCI, and 94% for cardiac catheterization.
- Expanding the date window to ±1 day improved PPVs, exceeding 98% for CABG surgery and 97% for valve surgery.
- The CIHI administrative data demonstrated strong concordance with the clinical registry for common cardiac procedures.
Conclusions:
- The coding accuracy of common cardiac procedures within the Canadian Institute for Health Information (CIHI) administrative database is high when validated against a clinical registry.
- These findings support the use of CIHI administrative data for reliable surveillance and analysis of cardiac procedures.
- The study underscores the utility of administrative data in health services research for cost-effective tracking of cardiovascular interventions.
Background:
Although cardiac procedures are commonly used to treat cardiovascular disease, they are costly. Administrative data sources could be used to track cardiac procedures, but sources of such data have not been validated against clinical registries.
Objectives:
To examine accuracy of cardiac procedure coding in administrative databases versus a prospective clinical registry.
Sample:
We examined a total of 182,018 common cardiac procedures including percutaneous coronary intervention (PCI), coronary artery bypass graft (CABG) surgery, valve surgery, and cardiac catheterization procedures during fiscal years 2005 and 2006 across 18 cardiac centers in Ontario, Canada.
Research Design:
Accuracy of codes in the Canadian Institute for Health Information (CIHI) administrative databases were compared with the clinical registry of the Cardiac Care Network.
Results:
Comparing 17,511 CIHI and 17,404 registry procedures for CABG surgery, the positive predictive value (PPV) of CIHI-coded CABG surgery was 97%. In 6229 CIHI-coded and 5885 registry-coded valve surgery procedures, the PPV of the administrative data source was 96%. Comparing 38,527 PCI procedures in CIHI to 38,601 in the registry, the PPV of CIHI was 94%. Among 119,751 CIHI-coded and 111,725 registry-coded cardiac catheterization procedures, the PPV of administrative data was 94%. When the procedure date window was expanded from the same day to ±1 days, the PPV was 96% (PCI) and exceeded 98% (CABG surgery), 97% (valve surgery), and 95% (cardiac catheterization).
Conclusions:
Using a clinical registry as the gold standard, the coding accuracy of common cardiac procedures in the CIHI administrative database was high.
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