We retrieved 384 studies after reading the titles and the abstracts for not investigating mental health disorders. Eighty-nine full-text studies were assessed and 39 articles were excluded for several reasons such as not using participants who were in the DRC; some studies looked at the mental health of refugees who were settling in other countries; and protocol studies were also excluded. Overall, 19 of 50 studies were cross-sectional and investigated the association between key factors.