A preliminary search was conducted using scientific databases, including PubMed and ScienceDirect. To identify additional articles, we performed a search of the grey literature using Google and Google Scholar. Endnote X 8.1 reference manager software was used to collect and organize the search results and to remove duplicate articles. The searches were restricted to free full-text articles reporting human studies in English language. All relevant articles available online through 1 August 2020 were considered.

Articles related to the prevalence and/or associated factors of ED among patients with diabetes were retrieved. We used combinations of the following key terms in the search: “erectile dysfunction”, “sexual function”, “sexual dysfunction”, “impotence”, “diabetes mellitus”, “risk factors”, “determinants”, “predictors” and “Ethiopia”.