A cross-sectional, observational study was conducted at a
primary care center in Shanghai, China between June and
October 2011. Participants were eligible if they received
their usual care at the primary care center and had a diagnosis
of T2DM. We excluded participants if they could
not complete the survey because of physical or cognitive
impairments. All participants provided written informed
consent. The Institutional Review Board of the School of
Public Health, Fudan University, approved the study.