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  • Title: Dabigatran use in elderly patients with atrial fibrillation.
    Author: Avgil-Tsadok M, Jackevicius CA, Essebag V, Eisenberg MJ, Rahme E, Behlouli H, Pilote L.
    Journal: Thromb Haemost; 2016 Jan; 115(1):152-60. PubMed ID: 26354766.
    Abstract:
    In elderly patients (≥ 75 years), evidence of dabigatran efficacy is lacking and increased vigilance is warranted. We aimed to assess dabigatran effectiveness and safety in elderly patients in real-world practice. We conducted a population-based study using administrative databases, in Quebec (1999-2013). Dabigatran users (110/150 mg) were compared with matched warfarin users with regard to stroke and bleeding events. Age was categorised into < 75 or ≥ 75 years. Propensity score adjusted models were used. The cohort consisted of 15,918 dabigatran users and 47,192 matched warfarin users, with 67.3% being elderly patients. The elderly predominantly used the lower dose (80.1%) while younger patients mainly used the higher dose (80.0%). In multivariable analyses adjusted for propensity score, the risk of stroke in elderly patients using dabigatran, was no different than the risk in warfarin users (HR 1.05, 95% CI: 0.93, 1.19) regardless of dabigatran dose. However, dabigatran was associated with lower rates of intracranial haemorrhage (HR 0.60, 95% CI: 0.47-0.76) and higher rates of gastrointestinal bleeding (HR 1.30 95% CI: 1.14-1.50) when compared to warfarin. Based on real-life experience, dabigatran can offer an alternative to warfarin in elderly patients, with fewer intracranial bleeding events. However, caution is warranted for gastrointestinal bleeding.
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