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Clinical Characteristics, Oral Anticoagulation Patterns, and Outcomes of Medicaid Patients With Atrial Fibrillation: Insights From the Outcomes Registry for Better Informed Treatment of Atrial Fibrillation (ORBIT-AF I) Registry.

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Date
2016-05-04
Authors
O'Brien, Emily C
Kim, Sunghee
Thomas, Laine
Fonarow, Gregg C
Kowey, Peter R
Mahaffey, Kenneth W
Gersh, Bernard J
Piccini, Jonathan P
Peterson, Eric D
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Abstract
BACKGROUND: Whereas insurance status has been previously associated with care patterns, little is currently known about the association between Medicaid insurance and the clinical characteristics, treatment, or outcomes of patients with atrial fibrillation (AF). METHODS AND RESULTS: We used data from adults with AF enrolled in the Outcomes Registry for Better Informed Treatment of AF (ORBIT-AF), a national outpatient registry conducted at 176 community, multispecialty sites. The primary outcome of interest was the proportion of patients prescribed any oral anticoagulation (OAC; warfarin or novel oral anticoagulants [NOAC]). Secondary outcomes of interest included the proportion of patients prescribed NOACs (dabigatran or rivaroxaban); time in therapeutic range (TTR) for warfarin users, all-cause mortality, stroke/systemic embolism, and major bleed. Of 10 133 patients, N=470 (4.6%) had Medicaid insurance. Medicaid patients were similarly likely to receive OAC at baseline (72.8% vs 76.3%; unadjusted P=0.079), but less likely to receive NOAC at baseline or follow-up (12.1% vs 16.3%; unadjusted P=0.019). After risk adjustment, Medicaid status was associated with lower use of OAC at baseline among patients with high stroke risk (odds ratio [OR]=0.68; 95% CI=0.49, 0.94), but was not associated with OAC use overall (OR=0.82; 95% CI=0.61, 1.09). Among warfarin users, median TTR was lower among Medicaid patients (60% vs 68%; P<0.0001; adjusted TTR difference, -2.9; 95% CI=-5.7, -0.2; P=0.04). Use of an NOAC over 2 years of follow-up was not statistically different by insurance. Compared with non-Medicaid patients, Medicaid patients had higher unadjusted rates of mortality, stroke/systemic embolism, and major bleeding; however, these differences were attenuated following adjustment for clinical characteristics. CONCLUSIONS: In a contemporary AF cohort, use of OAC overall and use of NOACs were not significantly lower among Medicaid patients relative to others. However, among warfarin users, Medicaid patients spent less time in therapeutic range compared with those with other forms of insurance.
Type
Journal article
Subject
Medicaid
anticoagulation
atrial fibrillation
quality of care
stroke prevention
Permalink
https://hdl.handle.net/10161/14998
Published Version (Please cite this version)
10.1161/JAHA.115.002721
Publication Info
O'Brien, Emily C; Kim, Sunghee; Thomas, Laine; Fonarow, Gregg C; Kowey, Peter R; Mahaffey, Kenneth W; ... Peterson, Eric D (2016). Clinical Characteristics, Oral Anticoagulation Patterns, and Outcomes of Medicaid Patients With Atrial Fibrillation: Insights From the Outcomes Registry for Better Informed Treatment of Atrial Fibrillation (ORBIT-AF I) Registry. J Am Heart Assoc, 5(5). 10.1161/JAHA.115.002721. Retrieved from https://hdl.handle.net/10161/14998.
This is constructed from limited available data and may be imprecise. To cite this article, please review & use the official citation provided by the journal.
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Scholars@Duke

O'Brien

Emily O'Brien

Associate Professor in Population Health Sciences
I am an epidemiologist and health services researcher at the Duke Clinical Research Institute. My research focuses on comparative effectiveness, patient-centered outcomes, and pragmatic health services research in cardiovascular and pulmonary disease.Areas of expertise: Epidemiology, Health Services Research, and Clinical Decision Sciences
Peterson

Eric David Peterson

Fred Cobb, M.D. Distinguished Professor of Medicine
Dr Peterson is the Fred Cobb Distinguished Professor of Medicine in the Division of Cardiology, a DukeMed Scholar, and the Past Executive Director of the Duke Clinical Research Institute (DCRI), Durham, NC, USA. Dr Peterson is the Principal Investigator of the National Institute of Health, Lung and Blood Institute (NHLBI) Spironolactone Initiation Registry Randomized Interventional Trial in Heart Failure With Preserved Ejection Fraction (SPIRRIT) Trial  He is also the Principal I
This author no longer has a Scholars@Duke profile, so the information shown here reflects their Duke status at the time this item was deposited.
Piccini

Jonathan Paul Piccini Sr.

Associate Professor of Medicine
Jonathan P. Piccini, MD, MHS, FACC, FAHA, FHRS is a clinical cardiac electrophysiologist and Associate Professor of Medicine with Tenure at Duke University Medical Center and the Duke Clinical Research Institute. He is the Director of the Cardiac Electrophysiology section at the Duke Heart Center. His focus is on the care of patients with atrial fibrillation and complex arrhythmias, with particular emphasis on catheter ablation, left atrial appendage occlusion, and lead extraction. His resear
Thomas

Laine Elliott Thomas

Associate Professor of Biostatistics & Bioinformatics
Causal Inference, Heterogeneity of Treatment Effects, Observational Data, Time-varying Treatments, Real World Evidence
Alphabetical list of authors with Scholars@Duke profiles.
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