Yes. HbA1c is associated with long-term complications caused by type 2 diabetes.
Good blood glucose control can reduce the risk of developing microvascular and macrovascular complications associated with type 2 diabetes mellitus. It can also delay the progression of diabetes complications.
Hb A1c readings can indicate glycaemic control from the previous 3 months in people with diabetes. People who have diabetes have higher levels of HbA1c, which could be two to three times higher than normal. There is a strong relationship between high Hb A1c readings and the risk of developing diabetes-related complications, including cardiovascular disease, retinopathy, and neuropathy. So good blood glucose control is essential to prevent diabetic complications.