Methods
A parallel randomized control trial was designed to assess the effectiveness of a 4-week intervention based on the integrated theoretical model in adults with T2D. The factors and underlying beliefs identified for intervention focus were based on an initial, formative qualitative study among 30 T2D participants. Ethical approval was obtained from the Ethics Committee of “Blinded for Review”. Given there are no national dietary or educational guidelines for diabetes in Iran, target behaviours were adapted from international guidelines such as the American Diabetes Associations (ADA, 2017), Diabetes Australia (Diabetes Australia, 2015), and the Joslin Diabetes Center (Joslin Diabetes Center, 2019). The study was registered with the Iranian Registry of Clinical Trials (IRCT2013040912961N1).