Identifying Information Form (IIF), Medication Adherence Report Scale (MARS), and Duke Anticoagulation Satisfaction Scale (DASS) were applied to the control group two times, once in the first interview and once in the interview held a month later. The control group was not provided with education. In line with ethical principles, education and education booklet was provided to this group after the scales were applied in the last interview held in the outpatient clinic control. The application of the scales took 20-25 minutes on average.

Identifying Information Form (IIF), Medication Adherence Report Scale (MARS), and Duke Anticoagulation Satisfaction Scale (DASS) were applied to the face-to-face group in the first interview. They were provided with face-to-face education on the determined date and in the specified environment. At the end of the education, education booklet was given to the individuals. Then, an appointment was made for a month later in hospital environment. In the interview held one month later, the scales were applied again for the last time.

IIF, MARS, and DASS were also applied to the online education group in the first interview. On the predetermined date and time, online education was given to individuals through video calls held on TEAMS, Google MEET, or WhatsApp. Then, the education booklet was sent to the participants through the application. An appointment date was determined to have another interview a month later. In the interview held a month later, the relevant scales were applied for the last time. At the end of the education, an evaluation was made, and the parts that were seen to be deficient and the issues/questions that the participants raised were repeated. Accordingly, the individuals in both intervention groups were requested to come for control a month later, and the scales were applied for the last time. Education was provided to the participants by the same researcher using the two methods, and the same education content and booklet was used.

Education content was prepared by the researchers by reviewing the literature. Education content included topics such as oral anticoagulant (OAC) medication introduction, OAC medication use, duration of use, most frequently seen side effects, interaction with other medications and foods, and points to consider while using the medication. While preparing the education content, expert opinions of five nurse academicians were taken. Evaluation of expert opinion was made through the form for Evaluation of the Appropriateness of Printed Materials and Discern. This education content created was provided to the face-to-face and online education groups in one session. Education sessions lasted approximately for 25-30 minutes.

The form developed by the researchers by reviewing the literature consisted of 14 questions regarding the individuals' sociodemographic characteristics (age, gender, marital status, occupation, etc.) and disease characteristics (presence of a chronic disease, etc.)

The 5-point Likert type scale has five items. The total scale score is calculated by summing all item scores. The score to be obtained from the scale ranges between 5-25. High scores obtained from the scale show better medication adherence.

The 7-point Likert type scale has 25 items under three subscales. High scores obtained from the scale show low medication satisfaction. The highest and lowest scores to be obtained from the scale are 175 and 25, respectively.