Overall concordance of incident atrial fibrillation diagnosis based on Atherosclerosis Risk in Communities data and Centers for Medicare and Medicaid Services data.

ARIC = Atherosclerosis Risk in Communities. CMS = Centers for Medicare and Medicaid Services. *All CMS includes MedPAR and outpatient claims. Inpatient CMS includes MedPAR claims. Outpatient CMS includes outpatient and carrier claims. % agreement calculated as the number of participants with consistent classification of diagnosed AF from active ARIC cohort follow-up and surveillance of CMS divided by the total number of observations and converted to a percent. % positive agreement calculated as the number of participants classified as having AF based on both active ARIC cohort follow-up and surveillance of CMS, conditional on being classified as having AF from at least one source, and converted to a percent. % negative agreement calculated as the number of participants classified as not having AF based on both active ARIC cohort follow-up and surveillance of CMS, conditional on being classified as not having AF from at least one source, and converted to a percent. Data are limited to participants enrolled in Medicare fee-for-service.