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Overview of study cohort derivation. Rheumatoid arthritis (RA) patients were identified within MarketScan commercial claims and encounters database between 2006 and 2014. A sub-cohort of incident RA was identified within the overall RA cohort. RA patients were matched 1:1 with non-RA patients on sex, year of birth, and year of enrollment.
Abbreviations: RA, rheumatoid arthritis; DMARD, disease-modifying anti-rheumatic drug
