“…This means that patients with chronic diseases would be expected to have a slightly higher persistence on account of this factor. Besides the aforementioned comorbidities, depression was commonly observed in our study cohort (35.4% of patients), which supports results from previous studies, which indicate that chronic pain has physical and psychological effects such as depression, anxiety, or sleeping problems 8,19,22,40,44,45 . It also stresses the finding that high rates of psychiatric disorders and psychological distress occur in persons who regularly use prescribed opioids and therefore often require a greater level of management, care, and use of healthcare resources 11,19,22,40,46,47 .…”