The prevalence of comorbid depression in patients with diabetes: A meta-analysis of observational studies.

Depression is one of the most common psychiatric disorders in patients with diabetes, which can exacerbate and accelerate adverse diabetes complaints by reducing self-care behaviors and medication adherence. The purpose of this study is to estimate the prevalence of depression in Iranian patients with diabetes. The search was conducted in the databases of Scientific Information Database (SID), MagIran, PubMed, Scopus, Web of Science, and Google Scholar. The following keywords and their possible combinations were used: depressive disorder, major depressive disorder, dysthymic disorder, diabetes mellitus and Iran. Heterogeneity between studies was examined with I2. The data were analyzed using the meta-analysis method and random-effects model with Stata version 11.0. The analysis of 37 selected articles with a total sample size of 7849 indicated that the overall prevalence of depression in Iranian patients with diabetes was 54% (95% CI: 47.32-60.70). In addition, the prevalence of depression in women (56.25%; 95% CI: 48.83-63.68) was higher than that of men (41.05%; 95% CI: 32.74-49.36). The results showed that there was no relationship between the prevalence of depression and publication year (0.249), sample size (p = 0.529), and mean age of the subjects (p = 0.330). More than half of the patients with diabetes suffer from depression. Identification and treatment of these patients can be an important step in controlling and delaying the diabetes complication.

Health literacy among Iranian patients with type 2 diabetes: A systematic review and meta-analysis.

Health literacy is one of the most important determinants of health. Limited health literacy can leads to reduced adherence to treatment, repeated hospitalizations, and increased diseases complications. Several studies on health literacy among Iranian patients with type 2 diabetes have reported different prevalences of health literacy. The present study is aimed to determine through a systematic review and meta-analysis the prevalence of adequate health literacy in the Iranian population. A total of 8 articles that met the inclusion criteria, published from inception until December 2018, were collected. Articles were searched using the following keywords and their possible combinations: Health Literacy, Illiteracy, Functional Health Literacy, Diabetes, Diabetes Mellitus, and Iran. The data were analyzed using meta-analysis and the random-effects model was used to obtain a pooled prevalence estimate along with its 95% confidence interval. Heterogeneity among the studies was assessed using the I2 statistic. Analyses were performed using STATA software, version 12. The overall prevalences of inadequate and borderline health literacy among Iranian patients with type 2 diabetes were 43.47% (95% CI: 31-55.95) and 26.34% (95% CI: 19.49-33.19), respectively. In addition, the prevalence of adequate health literacy among patients with type 2 diabetes was 29.72% (95% CI: 22.79-36.64). There was no significant relationship between health literacy with year of publication, sample size, and patients' age. Inadequate health literacy is high (43.5%) among Iranian patients with type 2 diabetes. This makes it necessary to provide interventions aimed at improving their heath literacy which will reduce hospitalizations and diseases complications.