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2. Classification and Diagnosis of Diabetes: Standards of Medical Care in Diabetes—2022

Open access
American Diabetes Association Professional Practice Committee·2022·Diabetes Care

Abstract

The American Diabetes Association (ADA) “Standards of Medical Care in Diabetes” includes the ADA’s current clinical practice recommendations and is intended to provide the components of diabetes care, general treatment goals and guidelines, and tools to evaluate quality of care. Members of the ADA Professional Practice Committee, a multidisciplinary expert committee (https://doi.org/10.2337/dc22-SPPC), are responsible for updating the Standards of Care annually, or more frequently as warranted. For a detailed description of ADA standards, statements, and reports, as well as the evidence-grading system for ADA’s clinical practice recommendations, please refer to the Standards of Care Introduction (https://doi.org/10.2337/dc22-SINT). Readers who wish to comment on the Standards of Care are invited to do so at professional.diabetes.org/SOC.

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Registry

Crossref · 10.2337/dc22-s002

Cites

253 of 253 references verified0 citation errors · 0 not checkable

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  • Glycemic management is primarily assessed with the HbA1c test, which was the measure used in trials demonstrating the benefits of glucose lowering.

    “Glycemic management is primarily assessed with the HbA1c test, which was the measure used in trials demonstrating the bene fi ts of glucose lowering (2,52).”

    From Management of Hyperglycemia in Type 2 Diabetes, 2022. A Consensus Report by the American Diabetes Association (ADA) and the European Association for the Study of Diabetes (EASD) (2022) · cites this paper as [52]

    The Fasting and 2-Hour Plasma Glucose section (page unavailable) describes A1C as a measure of average blood glucose and says point-of-care A1C may be used to assess glycemic control in the clinic. It does not establish that HbA1c is the primary measure of glycemic management or say it was the measure used in trials demonstrating benefits of glucose lowering. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • Autoantibody markers are usually present in 85% to 90% of individuals with type 1 diabetes when fasting hyperglycemia is initially detected.

    “Autoantibody markers are usually present in 85% to 90% of individuals with type 1 diabetes when fasting hyperglycemia is initially detected (2).”

    From Guidelines and Recommendations for Laboratory Analysis in the Diagnosis and Management of Diabetes Mellitus (2023) · cites this paper as [2]

    The Diagnosis section says that stage 1 type 1 diabetes is defined by two or more autoimmune markers, supporting their role in the disease. Our copy does not give an 85%–90% prevalence or tie that figure to the initial detection of fasting hyperglycemia; searches for those terms found no matching passage. Page numbers were not provided. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Chronic diseases, such as T2DM, develop over a long period.

    “Chronic diseases, such as T2DM, develop over a long period [102].”

    From Digital Health Interventions to Prevent Type 2 Diabetes Mellitus: Systematic Review (2025) · cites this paper as [102]

    The Type 2 Diabetes section says hyperglycemia develops gradually and type 2 diabetes frequently goes undiagnosed for many years, supporting the claim about T2DM. The paper does not establish that chronic diseases generally develop over a long period. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • 10 of 42 (24%) men with fibromyalgia syndrome had a 2-hour plasma glucose level ≥140 mg/dL on the oral glucose tolerance test, indicative of impaired glucose tolerance.

    “Overall, 10 of 42 (24%) patients had a 2-hour plasma glucose level ≥140 mg/dL on the oral glucose tolerance test indicative of impaired glucose tolerance according to the World Health Organization (WHO) and the American Diabetes Association.1”

    From Pain and small fiber pathology in men with fibromyalgia syndrome (2024) · cites this paper as [1]

    The Diagnosis section defines impaired glucose tolerance as a 2-hour plasma glucose level of 140–199 mg/dL during a 75-g oral glucose tolerance test. The cited standard supports the 140 mg/dL lower threshold, but not the unqualified claim that every result ≥140 mg/dL indicates impaired glucose tolerance; the paper gives 200 mg/dL as the diagnostic threshold for diabetes. The count of 10 of 42 patients is the citing authors’ result, not a finding attributed to this guideline. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • HbA1c measurement has limitations.

    “As with any laboratory test, HbA1c measurement has limitations (2,52).”

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Cites

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Research works printed but not linked: 2

  1. [31]31. Lacy ME, Wellenius GA, Sumner AE, et al. Association of sickle cell trait with hemoglobin A1c in African Americans. JAMA 2017;317: 507-515
  2. [40]40. Bergenstal RM, Gal RL, Connor CG, et al.; T1D Exchange Racial Differences Study Group. Racial differences in the relationship of glucose concentrations and hemoglobin A1c levels. Ann Intern Med 2017;167:95-102

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Authors
American Diabetes Association Professional Practice Committee
Venue
Diabetes Care
Published
2021-12-16
Volume
45
Issue
Supplement_1
Pages
S17-S38
ISSN
0149-5992 (ISSN-L)
OpenAlex
W4200148796
Cited by
4,792
References
253
Citations by year
2026: 293 · 2025: 689 · 2024: 1026 · 2023: 1164 · 2022: 814 · 2021: 356 · 2020: 238 · 2019: 145 · 2018: 53 · 2017: 3 · 2016: 1 · 2015: 3 · 2013: 1
FWCI
129.37
Type
journal article
Language
en
Open access
Locations
  • Diabetes Care (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Treatment and Management
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
Keywords
diabetes classification, diabetes diagnosis, diabetes diagnosis criteria, diabetes subtypes
MeSH terms
Diabetes Mellitus, Endocrinology, Humans, Reference Standards, Societies, Medical, Standard of Care

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