PMID- 33082551 OWN - NLM STAT- MEDLINE DCOM- 20210122 LR - 20221207 IS - 1759-5037 (Electronic) IS - 1759-5029 (Linking) VI - 16 IP - 12 DP - 2020 Dec TI - The trials and tribulations of determining HbA(1c) targets for diabetes mellitus. PG - 717-730 LID - 10.1038/s41574-020-00425-6 [doi] AB - Glycated haemoglobin (HbA(1c)) is considered the gold standard for predicting glycaemia-associated risks for the microvascular and macrovascular complications of diabetes mellitus over 5-10 years. The value of HbA(1c) in the care of patients with type 1 diabetes mellitus (T1DM) and type 2 diabetes mellitus (T2DM) is unassailable, yet HbA(1c) targets remain contentious. Guidelines from diabetes care organizations recommend conflicting HbA(1c) targets - generally between 6.5% and 8%. However, all such organizations advocate for individualization of HbA(1c) targets, leaving both health-care providers and their patients confused about what HbA(1c) target is appropriate in an individual patient. In this Review, we outline the landmark T1DM and T2DM trials that informed the current guidelines, we discuss the evidence that drives individualized HbA(1c) targets, we examine the limitations of HbA(1c), and we consider alternatives for monitoring glycaemic control. Ultimately, in synthesizing this literature, we argue for an HbA(1c) target of <7% for most individuals, but emphasize the importance of helping patients determine their own personal goals and determinants of quality of life that are independent of a particular glycaemic target. We also recognize that as newer technologies and anti-hyperglycaemic therapies emerge, glycaemic targets will continue to evolve. FAU - Klein, Klara R AU - Klein KR AUID- ORCID: 0000-0002-5894-9054 AD - Division of Endocrinology and Metabolism, University of North Carolina School of Medicine, Chapel Hill, NC, USA. klara_klein@med.unc.edu. FAU - Buse, John B AU - Buse JB AD - Division of Endocrinology and Metabolism, University of North Carolina School of Medicine, Chapel Hill, NC, USA. LA - eng GR - UL1 TR002489/TR/NCATS NIH HHS/United States GR - P30 DK124723/DK/NIDDK NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Review DEP - 20201020 PL - England TA - Nat Rev Endocrinol JT - Nature reviews. Endocrinology JID - 101500078 RN - 0 (Glycated Hemoglobin A) RN - 0 (Hypoglycemic Agents) SB - IM MH - Animals MH - Diabetes Mellitus/blood/drug therapy/*metabolism MH - Diabetes Mellitus, Type 1/blood/drug therapy/metabolism MH - Diabetes Mellitus, Type 2/blood/drug therapy/metabolism MH - Glycated Hemoglobin/analysis/*metabolism MH - Goals MH - Humans MH - Hypoglycemic Agents/*therapeutic use EDAT- 2020/10/22 06:00 MHDA- 2021/01/23 06:00 CRDT- 2020/10/21 05:59 PHST- 2020/09/16 00:00 [accepted] PHST- 2020/10/22 06:00 [pubmed] PHST- 2021/01/23 06:00 [medline] PHST- 2020/10/21 05:59 [entrez] AID - 10.1038/s41574-020-00425-6 [pii] AID - 10.1038/s41574-020-00425-6 [doi] PST - ppublish SO - Nat Rev Endocrinol. 2020 Dec;16(12):717-730. doi: 10.1038/s41574-020-00425-6. Epub 2020 Oct 20.