The data collection tool comprised the Adherence Questionnaire in Patients with Chronic Diseases (AQPCD), developed by Fatemi et al. (
15), and a needs assessment checklist. Initially, there were 14 items about demographic characteristics and phone numbers of the patients and caregivers along with information related to the disease. The AQPCD was designed and psychometrically evaluated in 2013, containing 40 items and seven domains, including interest in treatment (9 items), willingness to participate in treatment (7 items), adaptability (7 items), integrating treatment with life (5 items), AT (4 items), commitment regarding treatment (5 items), and hesitation to implement treatment (3 items). The scoring procedure in this questionnaire was based on a six-point Likert-type scale from “completely agree” with 5 points to “not at all” with 0 points. Items no. 33, 34, 35, 37, 38, 39, and 40 were scored in reverse. The maximum and minimum scores could be calculated, with scoring having a positive direction, meaning the added degree of desirability led to higher points; thus, the higher the total score or the score of each domain, the higher the respondent’s AT. The AT rate was interpreted as very good (75 - 100%), good (50 - 74%), moderate (26 - 49%), and poor (0 - 25%) based on the points obtained. To ensure content validity, content validity ratio (CVR) and content validity index (CVI) were calculated. The mean CVI of the questionnaire was 0.914. Its internal consistency was established by calculating Cronbach’s alpha (α = 0.921), and reliability was determined through test-retest with a two-week interval (intraclass correlation [ICC] = 0.92). This questionnaire had been administered in some works (
16,
17). Using Cronbach’s alpha in the present study, the reliability of this tool was estimated at 0.89. A needs assessment checklist was also prepared, with an average content validity index of 0.897, and using Cronbach’s alpha in the present study, the reliability of this tool was estimated at 0.913.