[Development of a questionnaire to identify patients' preference for a conventional or a direct oral anticoagulant]

Oral anticoagulant therapy is currently performed using vitamin K-dependent (VKA) or novel, non-vitamin-K-dependent (NOAC) anticoagulants. Patients can thus be involved into the decision process which type of anticoagulants to use. Preference of patients for a specific type of anticoagulants is included in several international guidelines for prophylaxis of embolic events in patients with atrial fibrillation.

Description of the development of a short questionnaire to identify this preference in patients treated with VKA.

Using the questionnaires Freiburger personality inventory (FPI-R), health survey SF-12, State-Trait Anxiety Inventory (STAI) and a self-developed questionnaire on anticoagulant therapy, multiple regression analysis identified 7 items for the willingness of patients to change anticoagulation from VKA to NOAC with a probability of about 90%.

Further investigations have to be performed to identify the preference of patients for anticoagulation with VKA using this short questionnaire.