Individual Patient Data from the Pivotal Randomized Controlled Trials of Non-Vitamin K Antagonist Oral Anticoagulants in Patients with Atrial Fibrillation (COMBINE AF): Design and Rationale: From the COMBINE AF (A Collaboration between Multiple institutio
Non-vitamin K antagonist oral anticoagulants (NOACs) are the preferred class of medications for prevention of stroke and systemic embolism in patients with atrial fibrillation unless contraindications exist. Five large, international, randomized, controlled trials of NOACs versus either warfarin or aspirin have been completed to date.
COMBINE AF incorporates de-identified individual patient data from 77,282 patients with atrial fibrillation at risk for stroke randomized to NOAC, warfarin, or aspirin from 5 pivotal randomized controlled trials. All patients randomized in the constituent trials are included. Variables common to ≥3 of the constituent trials are included in the master database. Individual trial data sets from the 4 coordinating centers were combined at the Duke Clinical Research Institute. The final database will be securely shared with the 4 academic coordinating centers. The combined master database will be used to perform statistical analyses aimed at better understanding underlying risk factors and outcomes in patients with atrial fibrillation treated with oral anticoagulants, with a special focus on patient subgroups and uncommon outcomes. The initial analysis from COMBINE AF will be a network meta-analysis investigating the relative efficacy and safety of pooled higher-dose NOACs versus pooled lower-dose NOACs versus warfarin with respect to multiple time-to-event efficacy and safety outcomes. COMBINE AF is registered with PROSPERO (CRD42020178771).
In conclusion, COMBINE AF provides a rich and robust database consisting of individual patient data and will offer opportunities to investigate oral anticoagulants across many patient subgroups. Data sharing and collaboration across academic institutions and investigators will serve as overarching themes.
Carnicelli AP
,Hong H
,Giugliano RP
,Connolly SJ
,Eikelboom J
,Patel MR
,Wallentin L
,Morrow DA
,Wojdyla D
,Hua K
,Hohnloser SH
,Oldgren J
,Ruff CT
,Piccini JP
,Lopes RD
,Alexander JH
,Granger CB
,COMBINE AF Investigators
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Long-term risks and benefits of oral anticoagulation in atrial fibrillation patients with cancer: A report from the GLORIA-AF registry.
Anticoagulation therapy in patients with atrial fibrillation (AF) and concomitant cancer can be challenging due to the significantly increased risk of both embolism and bleeding. Moreover, the benefits and risks of vitamin K antagonists (VKA, eg. warfarin) versus non-vitamin K antagonist oral anticoagulants (NOACs) in such patients are less well understood.
From the prospective, global, multi-centered Global Registry on Long-Term Antithrombotic Treatment in Patients with Atrial Fibrillation (GLORIA-AF), we characterized these patients according to their history of prior cancer when enrolled. All patients received anticoagulant therapy. The primary outcome was the composite of all-cause mortality, stroke, transient ischemic attack, systemic embolism. The secondary endpoints were all-cause mortality, cardiovascular death, stroke, major bleeding and thromboembolism during the 3 years follow-up period. Cox regression analyses were used to calculate the hazard ratio (HR) and confidence interval (CI) following propensity score matching (PSM).
Overall, among 16,700 patients enrolled in Phase III in GLORIA-AF, 1725 (10%) patients had concomitant cancer(s) at enrolment. After PSM, the primary outcome occurred in 250 (14.8%) of patients with cancer(s) and 160 (9.3%) without cancer(s) (HR, 1.62 [95% CI, 1.33-1.97], p < .001) during the 3 years follow-up period. The risk of all-cause mortality was significantly higher in patients with cancer(s) versus non- cancer(s) (HR, 1.71 [95% CI, 1.37-2.12], p < .001). In patients with cancer(s), after PSM, the use of NOACs was associated with reduced risk of the primary outcome compared with that of VKA (HR, .69 [95% CI, .49-.99], p = .043), as well as a lower risk of thromboembolism (HR, .49 [95% CI, .24-1.00], p = .051), but the risk of major bleeding was not significantly different (HR, .87 [95% CI, .48-1.56], p = .635). Subgroup analysis in patients with cancers showed a reduced risk of major bleeding with NOACs compared with VKA (HR, .18 [95% CI, .04-.8], p = .024) in patients with coronary artery disease (CAD). For the main cancer subtypes (genitourinary, breast, gastrointestinal, haematological and skin), the trends for the risk of primary outcome were consistently favouring NOACs compared with VKA without any significant interaction among these five cancers.
Cancer is a common comorbidity in patients with AF and is associated with increased risk of composite of all-cause mortality and thromboembolism. Compared with VKA, NOACs was associated with a lower risk of composite events and showed an advantage in lower risk of thromboembolism, as well as a reduced risk of major bleeding when CAD was also present.
Li M
,Huang B
,Lam SHM
,Ishiguchi H
,Liu Y
,Olshansky B
,Huisman MV
,Chao TF
,Lip GYH
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