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Journal Article
Multicenter Study
Research Support, Non-U.S. Gov't
The Effect of Bleeding Risk and Frailty Status on Anticoagulation Patterns in Octogenarians With Atrial Fibrillation: The FRAIL-AF Study.
Canadian Journal of Cardiology 2016 Februrary
BACKGROUND: Older adults are at increased risk of atrial fibrillation (AF), its thromboembolic complications, and bleeding. A significant percentage of octogenarians do not receive anticoagulation therapy. The objective of this study was to investigate the effect of thromboembolic risk, bleeding risk, and frailty on the anticoagulation status of octogenarians hospitalized with AF.
METHODS: A cross-sectional study was conducted in 682 hospitalized patients aged 80 years and older with AF or atrial flutter in Montreal, Québec. Consumption of warfarin or a new oral anticoagulant was documented. Medical record data were used to determine each patient's frailty status using the Clinical Frailty Scale (CFS) and to evaluate the risk of stroke (CHADS2 [Congestive Heart Failure, Hypertension, Age, Diabetes, Stroke/Transient Ischemic Attack]) and bleeding (HAS-BLED [Hypertension, Abnormal renal/liver function, Stroke, Bleeding history or predisposition, Labile international normalized ratio, Elderly (> 65 years) Drugs/alcohol concomitantly]). Univariable and multivariable logistic regression analyses were used to examine the effect of frailty status and the risk of stroke and bleeding on the probability of receiving anticoagulation therapy.
RESULTS: Seventy percent of octogenarians with AF received anticoagulation therapy (n = 475). A high risk of stroke (CHADS2 = 3 compared with CHADS2 = 1, odds ratio [OR], 3.58; 95% confidence interval [CI], 1.09-11.77), and the absence of severe frailty (CFS < 7; OR, 3.41; 95% CI, 1.84-6.33) were independently associated with anticoagulant use in multivariable analyses. A high risk of bleeding (HAS-BLED score ≥ 3; OR, 0.33; 95% CI, 0.12-0.86) was associated with the absence of anticoagulation.
CONCLUSIONS: Our study suggests a higher prevalence of appropriate anticoagulation among octogenarians with AF than reported in previous studies. Further work is needed to develop and disseminate tools to optimize the use of anticoagulants in this high-risk population.
METHODS: A cross-sectional study was conducted in 682 hospitalized patients aged 80 years and older with AF or atrial flutter in Montreal, Québec. Consumption of warfarin or a new oral anticoagulant was documented. Medical record data were used to determine each patient's frailty status using the Clinical Frailty Scale (CFS) and to evaluate the risk of stroke (CHADS2 [Congestive Heart Failure, Hypertension, Age, Diabetes, Stroke/Transient Ischemic Attack]) and bleeding (HAS-BLED [Hypertension, Abnormal renal/liver function, Stroke, Bleeding history or predisposition, Labile international normalized ratio, Elderly (> 65 years) Drugs/alcohol concomitantly]). Univariable and multivariable logistic regression analyses were used to examine the effect of frailty status and the risk of stroke and bleeding on the probability of receiving anticoagulation therapy.
RESULTS: Seventy percent of octogenarians with AF received anticoagulation therapy (n = 475). A high risk of stroke (CHADS2 = 3 compared with CHADS2 = 1, odds ratio [OR], 3.58; 95% confidence interval [CI], 1.09-11.77), and the absence of severe frailty (CFS < 7; OR, 3.41; 95% CI, 1.84-6.33) were independently associated with anticoagulant use in multivariable analyses. A high risk of bleeding (HAS-BLED score ≥ 3; OR, 0.33; 95% CI, 0.12-0.86) was associated with the absence of anticoagulation.
CONCLUSIONS: Our study suggests a higher prevalence of appropriate anticoagulation among octogenarians with AF than reported in previous studies. Further work is needed to develop and disseminate tools to optimize the use of anticoagulants in this high-risk population.
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