In the previous cohort studies focused on diabetes in China, there were few studies on elderly patients with diabetes. The aim of this prospective cohort study was to investigate the prevalence, management and nutritional status of elderly diabetic patients aged ≥65 years in Shanghai and Suzhou communities, and record the occurrence of endpoint events.

This is a multicenter, observational, prospective cohort study.We plan to collect the baseline information in three years, and follow up every two years for at least 10 years. The study will enroll 5000 elderly diabetic patients aged ≥65 years and be conducted in Shanghai and Suzhou. The primary outcomes include MACE(major adverse cardiovascular events) , all-cause mortality, and chronic complications of diabetes and so on.

Inclusion Criteria:

• Men or women aged 65-100 years old;
• Patients who had been diagnosed with diabetes mellitus.

Exclusion Criteria:

• Patients with psychiatric disorders or impaired cognitive function;
• Patients who cannot or reject to sign the consent form.

This is a multicenter, observational, prospective cohort study.We plan to collect the baseline information in three years, and follow up every two years for at least 10 years. The study will enroll 5000 elderly diabetic patients aged ≥65 years and be conducted in Shanghai and Suzhou communities.