TY - JOUR
T1 - Net Clinical Benefit of Antithrombotic Therapy in Patients With Atrial Fibrillation and Chronic Kidney Disease
T2 - A Nationwide Observational Cohort Studys
AU - Bonde, Anders Nissen
AU - Lip, Gregory Y H
AU - Kamper, Anne-Lise
AU - Hansen, Peter Riis
AU - Lamberts, Morten
AU - Hommel, Kristine
AU - Hansen, Morten Lock
AU - Gislason, Gunnar Hilmar
AU - Torp-Pedersen, Christian
AU - Olesen, Jonas Bjerring
N1 - Copyright © 2014 American College of Cardiology Foundation. Published by Elsevier Inc. All rights reserved.
PY - 2014
Y1 - 2014
N2 - Background The balance between stroke reduction and increased bleeding associated with antithrombotic therapy among patients with atrial fibrillation (AF) and chronic kidney disease (CKD) is controversial. Objectives This study assessed the risk associated with CKD in individual CHA2DS2-VASc (Congestive heart failure; Hypertension; Age ≥75 years; Diabetes mellitus; previous Stroke, transient ischemic attack, or thromboembolism; Vascular disease; Age 65 to 74 years; Sex category) strata and the net clinical benefit of warfarin in patients with AF and CKD in a nationwide cohort. Methods By individual-level linkage of nationwide Danish registries, we identified all patients discharged with nonvalvular AF from 1997 to 2011. The stroke risk associated with non-end-stage CKD and end-stage CKD (e.g., patients on renal replacement therapy [RRT]) was estimated using Cox regression analyses. The net clinical benefit of warfarin was assessed using 4 endpoints: a composite endpoint of death/hospitalization from stroke/bleeding; a composite endpoint of fatal stroke/fatal bleeding; cardiovascular death; and all-cause death. RESULTS From nonvalvular AF patients (n = 154,259), we identified 11,128 patients (7.2%) with non-end-stage CKD and 1,728 (1.1%) receiving RRT. In all CHA2DS2-VASc risk groups, RRT was independently associated with a higher risk of stroke/thromboembolism, from a 5.5-fold higher risk in patients with CHA2DS2-VASc score = 0 to a 1.6-fold higher risk in patients with CHA2DS2-VASc score ≥2. In patients receiving RRT with CHA2DS2-VASc score≥2, warfarin was associated with lower risk of all-cause death (hazard ratio [HR]: 0.85, 95% confidence interval [CI]: 0.72 to 0.99). In non-end-stage CKD patients with CHA2DS2-VASc score ≥2, warfarin was associated with a lower risk of a composite outcome of fatal stroke/fatal bleeding (HR: 0.71, 95% CI: 0.57 to 0.88), a lower risk of cardiovascular death (HR: 0.80, 95% CI: 0.74 to 0.88), and a lower risk of all-cause death (HR: 0.64, 95% CI: 0.60 to 0.69). Conclusions CKD is associated with a higher risk of stroke/thromboembolism across stroke risk strata in AF patients. High-risk CKD patients (CHA2DS2-VASc ≥2) with AF benefit from warfarin treatment for stroke prevention.
AB - Background The balance between stroke reduction and increased bleeding associated with antithrombotic therapy among patients with atrial fibrillation (AF) and chronic kidney disease (CKD) is controversial. Objectives This study assessed the risk associated with CKD in individual CHA2DS2-VASc (Congestive heart failure; Hypertension; Age ≥75 years; Diabetes mellitus; previous Stroke, transient ischemic attack, or thromboembolism; Vascular disease; Age 65 to 74 years; Sex category) strata and the net clinical benefit of warfarin in patients with AF and CKD in a nationwide cohort. Methods By individual-level linkage of nationwide Danish registries, we identified all patients discharged with nonvalvular AF from 1997 to 2011. The stroke risk associated with non-end-stage CKD and end-stage CKD (e.g., patients on renal replacement therapy [RRT]) was estimated using Cox regression analyses. The net clinical benefit of warfarin was assessed using 4 endpoints: a composite endpoint of death/hospitalization from stroke/bleeding; a composite endpoint of fatal stroke/fatal bleeding; cardiovascular death; and all-cause death. RESULTS From nonvalvular AF patients (n = 154,259), we identified 11,128 patients (7.2%) with non-end-stage CKD and 1,728 (1.1%) receiving RRT. In all CHA2DS2-VASc risk groups, RRT was independently associated with a higher risk of stroke/thromboembolism, from a 5.5-fold higher risk in patients with CHA2DS2-VASc score = 0 to a 1.6-fold higher risk in patients with CHA2DS2-VASc score ≥2. In patients receiving RRT with CHA2DS2-VASc score≥2, warfarin was associated with lower risk of all-cause death (hazard ratio [HR]: 0.85, 95% confidence interval [CI]: 0.72 to 0.99). In non-end-stage CKD patients with CHA2DS2-VASc score ≥2, warfarin was associated with a lower risk of a composite outcome of fatal stroke/fatal bleeding (HR: 0.71, 95% CI: 0.57 to 0.88), a lower risk of cardiovascular death (HR: 0.80, 95% CI: 0.74 to 0.88), and a lower risk of all-cause death (HR: 0.64, 95% CI: 0.60 to 0.69). Conclusions CKD is associated with a higher risk of stroke/thromboembolism across stroke risk strata in AF patients. High-risk CKD patients (CHA2DS2-VASc ≥2) with AF benefit from warfarin treatment for stroke prevention.
KW - Aged
KW - Anticoagulants
KW - Aspirin
KW - Atrial Fibrillation
KW - Cohort Studies
KW - Denmark
KW - Female
KW - Follow-Up Studies
KW - Hemorrhage
KW - Hospitalization
KW - Humans
KW - Male
KW - Proportional Hazards Models
KW - Registries
KW - Renal Insufficiency, Chronic
KW - Renal Replacement Therapy
KW - Risk Assessment
KW - Stroke
KW - Thromboembolism
KW - Warfarin
U2 - 10.1016/j.jacc.2014.09.051
DO - 10.1016/j.jacc.2014.09.051
M3 - Journal article
C2 - 25500231
SN - 0735-1097
VL - 64
SP - 2471
EP - 2482
JO - Journal of the American College of Cardiology
JF - Journal of the American College of Cardiology
IS - 23
ER -