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Per-label dosing of direct oral anticoagulants (DOACs) is important for the prevention of stroke and systemic embolism among patients with non-valvular atrial fibrillation (NVAF), especially those with poor renal function, advanced age, low body weight or concomitant P-glycoprotein inhibitors. The study described DOAC use and dosing patterns in patients with NVAF in the UK.Using Clinical Practice Research Datalink (CPRD Gold), patients' profiles were described at DOAC initiation (1 January 2016-31 March 2021) and followed for a mean [standard deviation (SD)] 2 (1) years. Patients were categorised as under-dosing: received a lower dose with no indication for a reduced dose; over-dosing: received a standard dose with an indication for a reduced dose; per-label dosing, according to Summary Product Characteristics (SmPC).Forty thousand seven hundred forty-four adult patients with NVAF were identified (mean age: 75.3 (11.2) years; males: 55.4%); 22,827 (56.0%) initiated treatment with apixaban, 930 (2.3%) dabigatran, 5633 (13.8%) edoxaban and 11,354 (27.9%) rivaroxaban. Baseline Charlson comorbidity index ≥ 4 was 65.1%; CHAAlthough most patients received per-label dosing, ~ one in five patients was incorrectly dosed with DOAC, which may lead to serious clinical consequences and increased healthcare burden. |
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