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Accuracy of administrative claims data for polypectomy.
Jonathan M Wyse1, Lawrence Joseph, Alan N Barkun
1Division of Gastroenterology, Department of Medicine, Jewish General Hospital, McGill University, Montréal, Canada. jonwyse@gmail.com
Summary
Physician claims for polypectomy in administrative databases are reasonably accurate but underestimate procedure frequency by over 15%. This impacts colorectal cancer screening quality assurance, necessitating validation of claims data.
Area of Science:
- Gastroenterology and Hepatology
- Public Health and Epidemiology
- Health Services Research
Background:
- Polypectomy frequency is a key quality indicator for colorectal cancer screening programs.
- Administrative databases of physician claims offer population-level data but require accuracy validation.
- The accuracy of procedure codes in physician claims for polypectomy has not been previously examined.
Purpose of the Study:
- To determine the agreement between physician claims for polypectomy and documented procedures in endoscopy reports.
- To assess the accuracy of administrative claims data for evaluating polypectomy frequency in cancer screening.
Main Methods:
- Retrospective cohort study of 689 patients aged 50-80 undergoing colonoscopy.
- Data sourced from the Régie de l'Assurance Maladie du Québec (RAMQ) for physician claims.
- Accuracy evaluation by comparing RAMQ data against endoscopy report documentation.
Main Results:
- Physician claims demonstrated a sensitivity of 84.7% and specificity of 99.0% for polypectomy.
- Overall concordance was 95.1% with a kappa value of 0.87.
- Claims data underestimated the actual number of polypectomies performed.
Conclusions:
- Physician claims provide a reasonably accurate estimate of polypectomy frequency but underestimate procedures by over 15%.
- Discrepancies in claims data can affect quality assurance assessments for colorectal cancer screening.
- Validation of physician claims data from administrative databases is recommended, even with anticipated high accuracy.
