Recurrent VTE after stopping anticoagulant therapy in patients with different APA findings. The cumulative proportion for recurrent VTE during follow-up after stopping anticoagulant therapy according to the APA findings in different groups of patients. No APA means no positive APA test on all occasions tested, and any APA means ≥1 positive APA tests on ≥1 occasions; these 2 groups are mutually exclusive. Same APA means that the same type of APA was positive on 2 occasions; these patients are a subgroup of the any APA group. Different APA means that at least 2 different types of APAs were positive, either on the same or different occasions; these patients are a subgroup of the any APA group.