Travel habits and complications in patients treated with vitamin K antagonists: a cross sectional analysis.

Background: Travel-related conditions have impact on the quality of oral anticoagulation therapy (OAT) with vitamin K-antagonists. No predictors for travel activity and for travel-associated haemorrhage or thromboembolic complications of patients on OAT are known.

Methods: A standardised questionnaire was sent to 2500 patients on long-term OAT in Austria, Switzerland and Germany.