However, the medication adherence rate in our study group was slightly lower than that reported by Karter et al., who showed 22.3% of the participants did not continue to take the new prescription, indicating a medication adherence of ~78% [19]. Moreover, another study found that insulin adherence was 62-64% in T2DM patients, which is slightly lower than our results [ 20]. This evidence concerns the gene INS and type 2 diabetes mellitus.