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Major bleeding risk and healthcare economic outcomes of non-valvular atrial fibrillation patients newly-initiated with oral anticoagulant therapy in the real-world setting.

AIMS: This study compared the risk for major bleeding (MB) and healthcare economic outcomes of patients with non-valvular atrial fibrillation (NVAF) after initiating treatment with apixaban vs rivaroxaban, dabigatran, or warfarin.

METHODS: NVAF patients who initiated apixaban, rivaroxaban, dabigatran, or warfarin were identified from the IMS Pharmetrics Plus database (January 1, 2013-September 30, 2015). Propensity score matching (PSM) was used to balance differences in patient characteristics between study cohorts: patients treated with apixaban vs rivaroxaban, apixaban vs dabigatran, and apixaban vs warfarin. Risk of hospitalization and healthcare costs (all-cause and MB-related) were compared between matched cohorts during the follow-up.

RESULTS: During the follow-up, risks for all-cause (hazard ratio [HR] = 1.44, 95% confidence interval [CI] = 1.2-1.7) and MB-related (HR = 1.57, 95% CI = 1.0-2.4) hospitalizations were significantly greater for patients treated with rivaroxaban vs apixaban. Adjusted total all-cause healthcare costs were significantly lower for patients treated with apixaban vs rivaroxaban ($3,950 vs $4,333 per patient per month [PPPM], p = .002) and MB-related medical costs were not statistically significantly different ($100 vs $233 PPPM, p = .096). Risk for all-cause hospitalization (HR = 1.98, 95% CI = 1.6-2.4) was significantly greater for patients treated with dabigatran vs apixaban, although total all-cause healthcare costs were not statistically different. Risks for all-cause (HR = 2.22, 95% CI = 1.9-2.5) and MB-related (HR = 2.05, 95% CI = 1.4-3.0) hospitalizations were significantly greater for patients treated with warfarin vs apixaban. Total all-cause healthcare costs ($3,919 vs $4,177 PPPM, p = .025) and MB-related medical costs ($96 vs $212 PPPM, p = .026) were significantly lower for patients treated with apixaban vs warfarin.

LIMITATIONS: This retrospective database analysis does not establish causation.

CONCLUSIONS: In the real-world setting, compared with rivaroxaban and warfarin, apixaban is associated with reduced risk of hospitalization and lower healthcare costs. Compared with dabigatran, apixaban is associated with lower risk of hospitalizations.

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