Original Article

Validation of A Knowledge Test For Turkish Patients on Warfarin Therapy at An Ambulatory Anticoagulant Clinic


  • Meltem Turker
  • Mesut Sancar
  • Refik Demirtunc
  • Nazlıcan Uçar
  • Osman Uzman
  • Pınar Ay
  • Omer Kozan
  • Betul Okuyan

Received Date: 14.03.2020 Accepted Date: 21.10.2020 Turk J Pharm Sci 0;0(0):0-0 [e-Pub]


The aim of the present study was to evaluate the validity and reliability of an oral anticoagulation knowledge test for Turkish patients on warfarin therapy at an anticoagulant outpatient clinic.


This study was conducted at an ambulatory anticoagulation clinic with patients over 18 years old who had been using warfarin for at least six months. Demographic and clinical data were collected from all patients. Internal consistency was calculated using the Kuder Richardson coefficient, and test-retest reliability of the Turkish version of the Oral Anticoagulation Knowledge test was assessed.


Patients’ (n=240, 133 female) mean age was 59.83±11.93 (26-90) years. The mean score Oral Anticoagulation Knowledge test score was 14.19±3.01. The test-retest reliability of the scale (n=30) was moderate for the total score (p<0.001). The Kuder-Richardson 20 value, a measure of internal consistency, was calculated as 0.671. Patients with a younger age and higher education level were more likely to have higher levels of anticoagulation knowledge than patients with a higher age and lower education level (p<0.05 for both comparisons).


The Turkish version of the Oral Anticoagulation Knowledge test can be used to determine patients' knowledge regarding oral anticoagulation.

Keywords: Warfarin, anticoagulant, knowledge, pharmacist