Abstract 19941: Clinical and Demographic Characteristics According to Dosage Among New Initiators and/or Switchers From Warfarin Non-valvular Atrial Fibrillation Patients on Apixaban, Dabigatran and Rivaroxaban

Background: Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia [1-3] with increasing prevalence in the aging [4]. With the advent of the three NOACs including apixaban, dabigatran and rivaroxaban, it is important to characterize patients prescribed with the different dosage of treatment in the real-world setting. Purpose: To describe the baseline clinical and demographic characteristics of NVAF patients on apixaban (5 mg vs 2.5 mg -reduced), rivaroxaban (20mg vs reduced dose: 15 mg or 10 mg), and dabigatran (150 mg vs reduced 75 mg). Methods: A retrospective cohort study was conducted using MarketScan Earlyview® data. NVAF patients ≥18 years with a minimum of 1 year baseline period were included if they either received a NOAC or were switched from warfarin to NOAC during the study period of Jan 1, 2013 to October 31, 2014. Results: For NVAF patients , the majority of the patients were on the standard dosage (Table 1). Similarly for each NOAC, patients using low dosage versus standard...