Effects and Safety of Diabetic GUideline Algorithm Implementation Performed by Primary Care Physicians in the Community

Inclusion Criteria: * ①Males or females aged 65 and above (≥65) receive treatment from the local community health service center; * ②Diagnosed type 2 diabetes (ADA criteria): * A. Typical symptoms of diabetes + random blood sugar ≥ 11.1mmol/L; * B. Fasting blood glucose (FPG) ≥ 7.0mmol/L (fasting blood glucose is defined as no caloric intake within 8 hours); * C. Oral glucose tolerance test 2h blood glucose (OGTT) ≥ 11.1mmol/L (2h after meal); * D. have been treated with antidiabetic drugs; * Each blood sugar test must be repeated to confirm the diagnosis; * ③Complicated with chronic kidney disease and/or very high/high risk of cardiovascular disease, meet any one of the following: * A. ASCVD, including coronary heart disease, cerebral infarction, peripheral vascular disease; * B. Or target organ damage (albuminuria, renal impairment with eGFR ≥ 30 ml/min/1.73m2, left ventricular hypertrophy or retinopathy); * C. ≥ 3 major risk factors (age ≥ 65 years old, hypertension, dyslipidemia, smoking, obesity ); * D. Diabetes duration ≥ 10 years, with any one traditional cardiovascular risk factor such as advanced age, obesity, smoking, sedentary, family history of cardiovascular disease, hypertension, abnormal lipid metabolism. Exclusion Criteria: * ①Pregnant women or women planning to become pregnant; * ②eGFR\<30 mL/min/1.73m2 (CKD-EPI formula); * ③Patient cannot be followed up for 36 months (due to health condition or migration); * ④Unwilling or unable to sign the informed consent; * ⑤Type 1 diabetes;