In people with atrial fibrillation needing anticoagulant treatment, deaths were fewer in those who had direct acting oral anticoagulants compared with warfarin. The picture is less clear for the risk of stroke and complications such as bleeding in the brain or gut. Apixaban had the best efficacy and safety profile and was cost-effective compared with warfarin. This study pooled the data in all trials reporting efficacy, safety and cost of anticoagulant prevention of stroke events in people with atrial fibrillation. Researchers used a technique called network meta-analysis to compare the different drugs used. There is still a need for a trial directly comparing these drugs, to add to this evidence and to identify whether certain people might benefit more from one or other of the available agents.