“…The 11 selected studies looked at DPOs operating in: Nepal (Dhungana and Kusakabe, 2010); Bangladesh (Miles et al, 2012;Polu et al, 2015); the South Asian coastline (Hemingway and Priestley, 2006); Africa (Stewart and Bhagwanjee, 1999;Kleintjes et al, 2013); India (Kumaran, 2011;Cobley, 2013;Deepak et al, 2013); Bolivia (Griffiths et al, 2009); Brazil and India (Deepak et al, 2013); and Malaysia (Armstrong, 1993). Thus, 9 studies involved DPOs operating in low or lower-middle income countries (Hemingway and Priestley, 2006;Griffiths et al, 2009;Dhungana and Kusakabe, 2010;Kumaran, 2011;Miles et al, 2012;Cobley, 2013;Deepak et al, 2013;Kleintjes et al, 2013;Polu et al, 2015) and four included DPOs operating in upper-middle income settings (Armstrong, 1993;Stewart and Bhagwanjee, 1999;Deepak et al, 2013;Kleintjes et al, 2013). This review revealed that, as yet, there is no published literature above level three evidence on the Oxford Centre for Evidence-Based Medicine (OCEBM) hierarchy of evidence (2011) concerning the function of DPOs in LMICs (i.e., the highest level of evidence identified in this review was a cohort study design).…”