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Data Sources for Measuring Colorectal Endoscopy Use Among Medicare Enrollees

A. P. Schenck, C. N. Klabunde, J. L. Warren, S. Peacock, W. W. Davis, S. T. Hawley, M. Pignone, D. F. Ransohoff
2007 Cancer Epidemiology, Biomarkers and Prevention  
Estimates of colorectal cancer test use vary widely by data source. Medicare claims offer one source for monitoring test use, but their utility has not been validated. We compared ascertainment of sigmoidoscopy and colonoscopy between three data sources: self reports, Medicare claims, and medical records. Materials and Methods: The study population included Medicare enrollees residing in North Carolina (n = 561) who had participated in a telephone survey on colorectal cancer tests. Medicare
more » ... tests. Medicare claims were obtained for the 5 years preceding the survey (January 1, 1998 to December 31, 2002. Information about sigmoidoscopy and colonoscopy procedures conducted in physician offices were abstracted from medical records. Sensitivity, specificity, positive predictive value, negative predictive value, agreement, and k statistics were calculated using the medical record as the gold standard. Agreement on specific procedure type and purpose was also assessed.
doi:10.1158/1055-9965.epi-07-0123 pmid:17932360 fatcat:m3zr3keqxvd5xghowqnwuqr67y