Table 2.

The Search strategy

Domain	Search strategy
Diabetes	(“diabetes mellitus”[MeSH Terms] OR (“diabetes”[All Fields] AND “mellitus”[All Fields]) OR “diabetes mellitus”[All Fields]) AND “[Mesh] OR (”[All Fields] AND (“diabetes mellitus”[MeSH Terms] OR (“diabetes”[All Fields] AND “mellitus”[All Fields]) OR “diabetes mellitus”[All Fields]) AND ((“medical subject headings”[MeSH Terms] OR (“medical”[All Fields] AND “subject”[All Fields] AND “headings”[All Fields]) OR “medical subject headings”[All Fields] OR “mesh”[All Fields]) AND Terms[All Fields]) AND “diabetes mellitus”[MeSH Terms] OR (“diabetes”[All Fields] AND “mellitus”[All Fields]) OR “diabetes mellitus”[All Fields] OR “diabetes”[All Fields]
Socioeconomic factors	(((((((“Socioeconomic Factors”[Mesh] OR “Poverty”[Mesh]) OR “Social Class”[Mesh]) OR “Educational Status”[Mesh]) OR “Employment”[Mesh]) OR “Family Characteristics”[Mesh]) OR “Income”[Mesh]) OR “Occupations”[Mesh]) OR “Social Conditions”[Mesh] OR “Standard of Living”[All Fields] OR “living standard”[All Fields] OR “land tenure”[All Fields] OR “High-Income Population”[All Fields] OR “High Income Population”[All Fields] OR (“socioeconomic factors”[MeSH Terms] OR (“socioeconomic”[All Fields] AND “factors”[All Fields]) OR “socioeconomic factors”[All Fields] OR “inequality”[All Fields]) OR (“socioeconomic factors”[MeSH Terms] OR (“socioeconomic”[All Fields] AND “factors”[All Fields]) OR “socioeconomic factors”[All Fields] OR”inequalities“[All Fields])
Geographic area	(((“iran”[MeSH Terms] OR “iran”[All Fields]) OR iranian[All Fields] OR I.R.Iran[All Fields] OR “persia”[MeSH Terms]) OR ((“iran”[MeSH Terms] OR “iran”[All Fields]) OR iranian[All Fields] OR I.R. Iran[All Fields] OR persia[Title/Abstract])) OR ((“iran”[MeSH Terms] OR “iran”[All Fields]) OR iranian[All Fields] OR I.R. Iran[All Fields] OR persia[Text Word])