 In this study, researchers found that 56.8% of Iranian hemodialysis patients suffered from depression. They also noted that there was no correlation between the prevalence of depression and the methodological quality of the articles, duration of hemodialysis, publication year, mean age of participants or sample size. This article was authored by Ali Reza Abdi, Sahar Dalvand, Amir Vahidi Nazimi, and others.