Patients were categorized as having either poor or excellent glycemic control, with good control defined as having a HbA1c of less than 7.5%. There were 1062 patients in the trial, with 435 (40.96%) in the poor glycemic control group and 627 (59.04%) in the good control group. People with poor control had a substantially greater incidence of CKD (61.61%) than those with excellent control (52.47%) (p = 0.003). These findings indicate that poor glycemic control is linked to an increased risk and an earlier development of CKD, demonstrating that glycemic control is still clinically significant even in very old persons. Association between glycemic control and chronic kidney disease development in older patients with type 2 diabetes: A retrospective cohort study.