Objective To explore the long-term effect of peer support model on the self-efficacy, self-management and blood glucose control in patients with type 2 diabetes mellitus. Methods Diagnosed type 2 diabetes patients in five community health service centers in the south of Dongcheng district(formerly Chongwen District) in Beijing were selected as research objects. One intervention group and one control group were selected in each community health service center, and each group was comprised of about 15 patient...