Antiphospholipid antibodies in pulmonary embolism treated with direct oral anticoagulants: Prevalence data from unselected consecutive patients

•The rate of antiphospholipid syndrome in patients with pulmonary embolism (PE) is ill defined.•This was a retrospective report of consecutive patients with PE from a thrombosis treatment clinic.•The elevated levels of anticardiolipin or anti-β2-glycoprotein I antibodies normalized in 11 of 21 patients.•A relatively low prevalence of antiphospholipid syndrome (3.7%) was detected in unselected patients with PE.