There are no clear diagnostic criteria for type 2 diabetes. type 2 diabetes can be considered only if the diagnosis of diabetes is established and the following conditions are met: 1. pancreatic islet function is acceptable and the use of oral hypoglycemic drugs is effective. 2. type 1 diabetes, gestational diabetes and special types of diabetes are ruled out. 3. older age of onset and more obese body type. 4. tendency of family aggregation. the diagnosis of type 2 diabetes is not The diagnosis of type 2 diabetes is not set in stone. There are specific types of diabetes that are often diagnosed as type 2 diabetes until the diagnosis is clear.