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.