Prevalence and correlates of major depressive disorder: a systematic review

Objectives: Major depressive disorder (MDD) is one of the most disabling mental illnesses and it has a significant impact on society. This review aims to provide updated scientific evidence about the epidemiology of MDD. Methods: A systematic literature review of the PubMed and MEDLINE databases was performed to identify articles on the prevalence of MDD and its correlates. The search was restricted to manuscripts published between January 2001 and December 2018. Results: Sixty-three articles were included in the review. The lifetime prevalence of MDD ranged from 2 to 21%, with the highest ...