Cited by 2,245Diabetes Management and ResearchDiabetes, Cardiovascular Risks, and LipoproteinsDiabetes and associated disorders

Diagnosis and classification of diabetes mellitus

Open access
American Diabetes Association·2013·Diabetes Care

Abstract

DIABETESMELLITUSdDiabetes is a group of metabolic diseases characterized by hyperglycemia resulting from defects in insulin secretion, insulin action, or both.The chronic hyperglycemia of diabetes is associated with long-term damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels.

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Written from the paper’s full text.

TL;DR

This ADA position statement reviews the definition, classification, and diagnostic criteria for diabetes and prediabetes, emphasizing type 1, type 2, other specific types, and gestational diabetes mellitus (GDM). It affirms glucose- and A1C-based diagnostic thresholds and recommends updated IADPSG criteria for GDM.

Key findings

  • Diabetes is classified into type 1 (5–10% of cases), type 2 (∼90–95%), other specific types, and GDM; immune-mediated type 1 diabetes shows one or more autoantibodies in 85–90% of individuals when fasting hyperglycemia is initially detected.
  • Diagnostic criteria include FPG ≥126 mg/dl (7.0 mmol/l), 2-h PG ≥200 mg/dl (11.1 mmol/l) during a 75-g OGTT, or A1C ≥6.5%; random plasma glucose ≥200 mg/dl (11.1 mmol/l) can diagnose diabetes in patients with classic hyperglycemic symptoms or hyperglycemic crisis.
  • Prediabetes/increased risk is defined as IFG 100–125 mg/dl (5.6–6.9 mmol/l), IGT 140–199 mg/dl (7.8–11.0 mmol/l), or A1C 5.7–6.4%; A1C 6.0–6.5% carries a 5-year diabetes risk of 25–50% and relative risk 20 times higher than A1C 5.0%.
  • GDM affects approximately 7% of pregnancies (range 1–14% depending on population and tests); IADPSG recommends a 75-g OGTT at 24–28 weeks, with GDM diagnosed if any value is exceeded: fasting ≥92 mg/dl (5.1 mmol/l), 1 h ≥180 mg/dl (10.0 mmol/l), or 2 h ≥153 mg/dl (8.5 mmol/l).

Methods

  • This is an ADA clinical/consensus statement that synthesizes prior Expert Committee reports, International Expert Committee recommendations, IADPSG guidance, and epidemiologic evidence to define diabetes classification and diagnostic thresholds.
  • Evidence cited includes cross-sectional retinopathy studies, NHANES analyses, the Diabetes Prevention Program, a systematic review of 44,203 individuals from 16 cohort studies with mean follow-up 5.6 years, and the HAPO study of ∼25,000 pregnant women.
  • Main analysis is narrative synthesis and expert consensus; no new primary data are reported.

Limitations

  • The paper states that few randomized clinical trial data exist for treating women newly diagnosed with GDM by only one abnormal glucose value, and that additional well-designed clinical studies are needed to determine optimal monitoring and treatment intensity.
  • The paper states A1C diagnostic limitations: greater cost, limited availability in some developing regions, incomplete correlation with average glucose in certain individuals, and misleading results in anemia and hemoglobinopathies; point-of-care A1C assays are not sufficiently accurate for diagnosis.
  • The text makes evident that this is a consensus/guideline document rather than a systematic review, and it notes imperfect concordance among FPG, 2-h PG, and A1C, with discordant results requiring repeat/confirmatory testing.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.2337/dc13-s067

Cites

17 of 17 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 37 cited sources checked · 0 supported · 0 flagged

  • Findingnone given

    Permanent neonatal diabetes is most commonly a defect in the gene encoding the Kir6.2 subunit of the β-cell KATP channel.

    “The most common genetic defect causing transient disease is a defect on ZAC/HYAMI imprinting, whereas permanent neonatal diabetes is most commonly a defect in the gene encoding the Kir6.2 subunit of the β-cell KATP channel.”
    Quote in the paperNot a substantial claim
  • Findingreasoning

    The degree of hyperglycemia may change over time depending on the extent of the underlying disease process.

    “The degree of hyperglycemia (if any) may change over time, depending on the extent of the underlying disease process (Fig. 1).”
    Quote in the paperNot a substantial claim
  • Findingnone given

    Diabetes diagnosed in the first 6 months of life has been shown not to be typical autoimmune type 1 diabetes.

    “Diabetes diagnosed in the first 6 months of life has been shown not to be typical autoimmune type 1 diabetes.”
    Quote in the paperNot a substantial claim
  • Findingnone given

    Several forms of diabetes are associated with monogenetic defects in β-cell function.

    “Several forms of diabetes are associated with monogenetic defects in β-cell function.”
    Quote in the paperNot a substantial claim
  • Findingreasoning

    Type 2 diabetes frequently goes undiagnosed for many years because hyperglycemia develops gradually and at earlier stages is often not severe enough for the patient to notice classic symptoms.

    “This form of diabetes frequently goes undiagnosed for many years because the hyperglycemia develops gradually and at earlier stages is often not severe enough for the patient to notice any of the classic symptoms of diabetes.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. 52
  • May combine two claims. 36
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Patients with immune-mediated type 1 diabetes are prone to other autoimmune disorders such as Graves' disease, Hashimoto's thyroiditis, Addison's disease, vitiligo, celiac sprue, autoimmune hepatitis, myasthenia gravis, and pernicious anemia.

    “These patients are also prone to other autoimmune disorders such as Graves' disease, Hashimoto's thyroiditis, Addison's disease, vitiligo, celiac sprue, autoimmune hepatitis, myasthenia gravis, and pernicious anemia.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Patients with type 2 diabetes are at increased risk of developing macrovascular and microvascular complications.

    “Nevertheless, such patients are at increased risk of developing macrovascular and microvascular complications.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Type 2 diabetes is often associated with a strong genetic predisposition, more so than is the autoimmune form of type 1 diabetes.

    “It is often associated with a strong genetic predisposition, more so than is the autoimmune form of type 1 diabetes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingnone given

    Immune-mediated type 1 diabetes has strong HLA associations, with linkage to the DQA and DQB genes, and is influenced by the DRB genes.

    “Also, the disease has strong HLA associations, with linkage to the DQA and DQB genes, and it is influenced by the DRB genes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Type 2 diabetes accounts for ∼90-95% of those with diabetes.

    “This form of diabetes, which accounts for ∼90–95% of those with diabetes, previously referred to as non–insulin-dependent diabetes, type 2 diabetes, or adult-onset diabetes, encompasses individuals who have insulin resistance and usually have relative (rather than absolute) insulin deficiency”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    One and usually more of the autoantibodies associated with immune-mediated type 1 diabetes are present in 85-90% of individuals when fasting hyperglycemia is initially detected.

    “One and usually more of these autoantibodies are present in 85–90% of individuals when fasting hyperglycemia is initially detected.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    During the asymptomatic period of type 2 diabetes, an abnormality in carbohydrate metabolism can be demonstrated by measurement of plasma glucose in the fasting state or after an oral glucose load or by A1C.

    “During this asymptomatic period, it is possible to demonstrate an abnormality in carbohydrate metabolism by measurement of plasma glucose in the fasting state or after a challenge with an oral glucose load or by A1C.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Patients with diabetes have an increased incidence of atherosclerotic cardiovascular, peripheral arterial, and cerebrovascular disease.

    “Patients with diabetes have an increased incidence of atherosclerotic cardiovascular, peripheral arterial, and cerebrovascular disease.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Immune-mediated type 1 diabetes accounts for only 5-10% of those with diabetes.

    “This form of diabetes, which accounts for only 5–10% of those with diabetes, previously encompassed by the terms insulin-dependent diabetes or juvenile-onset diabetes, results from a cellular-mediated autoimmune destruction of the β-cells of the pancreas.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    MODY is characterized by impaired insulin secretion with minimal or no defects in insulin action.

    “They are referred to as maturity-onset diabetes of the young (MODY) and are characterized by impaired insulin secretion with minimal or no defects in insulin action.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    Symptoms of marked hyperglycemia include polyuria, polydipsia, weight loss, sometimes polyphagia, and blurred vision.

    “Symptoms of marked hyperglycemia include polyuria, polydipsia, weight loss, sometimes with polyphagia, and blurred vision.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    The risk of developing type 2 diabetes increases with age, obesity, and lack of physical activity.

    “The risk of developing this form of diabetes increases with age, obesity, and lack of physical activity.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    The most common form of MODY is associated with mutations on chromosome 12 in a hepatic transcription factor referred to as hepatocyte nuclear factor (HNF)-1α.

    “The most common form is associated with mutations on chromosome 12 in a hepatic transcription factor referred to as hepatocyte nuclear factor (HNF)-1α.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Acute, life-threatening consequences of uncontrolled diabetes are hyperglycemia with ketoacidosis or nonketotic hyperosmolar syndrome.

    “Acute, life-threatening consequences of uncontrolled diabetes are hyperglycemia with ketoacidosis or the nonketotic hyperosmolar syndrome.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    Type 2 diabetes occurs more frequently in women with prior GDM and in individuals with hypertension or dyslipidemia.

    “It occurs more frequently in women with prior GDM and in individuals with hypertension or dyslipidemia, and its frequency varies in different racial/ethnic subgroups.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    Long-term complications of diabetes include retinopathy with potential vision loss; nephropathy leading to renal failure; peripheral neuropathy with risk of foot ulcers, amputations, and Charcot joints; and autonomic neuropathy causing gastrointestinal, genitourinary, and cardiovascular symptoms and sexual dysfunction.

    “Long-term complications of diabetes include retinopathy with potential loss of vision; nephropathy leading to renal failure; peripheral neuropathy with risk of foot ulcers, amputations, and Charcot joints; and autonomic neuropathy causing gastrointestinal, genitourinary, and cardiovascular symptoms and sexual dysfunction.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    MODY is inherited in an autosomal dominant pattern.

    “They are inherited in an autosomal dominant pattern.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Some forms of type 1 diabetes have no known etiologies.

    “Some forms of type 1 diabetes have no known etiologies.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Idiopathic type 1 diabetes is strongly inherited, lacks immunological evidence for β-cell autoimmunity, and is not HLA associated.

    “This form of diabetes is strongly inherited, lacks immunological evidence for β-cell autoimmunity, and is not HLA associated.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Some patients with idiopathic type 1 diabetes have permanent insulinopenia and are prone to ketoacidosis, but have no evidence of autoimmunity.

    “Some of these patients have permanent insulinopenia and are prone to ketoacidosis, but have no evidence of autoimmunity.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    In type 2 diabetes, a degree of hyperglycemia sufficient to cause pathologic and functional changes in target tissues, but without clinical symptoms, may be present for a long period before diabetes is detected.

    “In the latter category, a degree of hyperglycemia sufficient to cause pathologic and functional changes in various target tissues, but without clinical symptoms, may be present for a long period of time before diabetes is detected.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    At least initially, and often throughout their lifetime, individuals with type 2 diabetes do not need insulin treatment to survive.

    “At least initially, and often throughout their lifetime, these individuals do not need insulin treatment to survive.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Chronic hyperglycemia of diabetes is associated with long-term damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels.

    “The chronic hyperglycemia of diabetes is associated with long-term damage, dysfunction, and failure of different organs, especially the eyes, kidneys, nerves, heart, and blood vessels.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    Most patients with type 2 diabetes are obese, and obesity itself causes some degree of insulin resistance.

    “Most patients with this form of diabetes are obese, and obesity itself causes some degree of insulin resistance.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Findingnone given

    Immune-mediated diabetes commonly occurs in childhood and adolescence, but it can occur at any age, even in the 8th and 9th decades of life.

    “Immune-mediated diabetes commonly occurs in childhood and adolescence, but it can occur at any age, even in the 8th and 9th decades of life.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Individuals with extensive β-cell destruction and therefore no residual insulin secretion require insulin for survival.

    “Individuals with extensive β-cell destruction and therefore no residual insulin secretion require insulin for survival.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Most cases of GDM resolve with delivery.

    “Although most cases resolve with delivery, the definition applied whether or not the condition persisted after pregnancy and did not exclude the possibility that unrecognized glucose intolerance may have antedated or begun concomitantly with the pregnancy.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingcitation

    Among the nondiabetic adult population, an FPG of 110 mg/dl (6.1 mmol/l) corresponds to an A1C of 5.6%, while an FPG of 100 mg/dl (5.6 mmol/l) corresponds to an A1C of 5.4%.

    “linear regression analyses of these data indicate that among the nondiabetic adult population, an FPG of 110 mg/dl (6.1 mmol/l) corresponds to an A1C of 5.6%, while an FPG of 100 mg/dl (5.6 mmol/l) corresponds to an A1C of 5.4% (R.T. Ackerman, personal communication).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites R.T. Ackerman, personal communication

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Certain viruses have been associated with β-cell destruction.

    “Certain viruses have been associated with β-cell destruction.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingcitation

    The diagnostic A1C cut point of 6.5% is associated with an inflection point for retinopathy prevalence, as are the diagnostic thresholds for FPG and 2-h PG.

    “The diagnostic A1C cut point of 6.5% is associated with an inflection point for retinopathy prevalence, as are the diagnostic thresholds for FPG and 2-h PG (3).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [3] International Expert Committee, 2009, International Expert Committee report on the role of the A1C assay in the diagnosis of diabetes, Diabetes Care source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Patients receiving α-interferon have been reported to develop diabetes associated with islet cell antibodies and, in certain instances, severe insulin deficiency.

    “Patients receiving α-interferon have been reported to develop diabetes associated with islet cell antibodies and, in certain instances, severe insulin deficiency.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingnone given

    Wolfram syndrome is an autosomal recessive disorder characterized by insulin-deficient diabetes and the absence of β-cells at autopsy.

    “Wolfram syndrome is an autosomal recessive disorder characterized by insulin-deficient diabetes and the absence of β-cells at autopsy.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    If extensive enough, cystic fibrosis and hemochromatosis will damage β-cells and impair insulin secretion.

    “If extensive enough, cystic fibrosis and hemochromatosis will also damage β-cells and impair insulin secretion.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Leprechaunism and Rabson-Mendenhall syndrome are two pediatric syndromes that have mutations in the insulin receptor gene with subsequent alterations in insulin receptor function and extreme insulin resistance.

    “Leprechaunism and the Rabson-Mendenhall syndrome are two pediatric syndromes that have mutations in the insulin receptor gene with subsequent alterations in insulin receptor function and extreme insulin resistance.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Production of mutant insulin molecules with resultant impaired receptor binding has been identified in a few families and is associated with an autosomal inheritance and only mildly impaired or even normal glucose metabolism.

    “Similarly, the production of mutant insulin molecules with resultant impaired receptor binding has also been identified in a few families and is associated with an autosomal inheritance and only mildly impaired or even normal glucose metabolism.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingcitation

    These studies demonstrated glycemic levels below which there was little prevalent retinopathy and above which the prevalence of retinopathy increased in an apparently linear fashion.

    “These studies demonstrated glycemic levels below which there was little prevalent retinopathy and above which the prevalence of retinopathy increased in an apparently linear fashion.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [1] 1997, Expert Committee on the Diagnosis and Classification of Diabetes Mellitus. Report of the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus, Diabetes Care source

      Not checked in the free run.

  • May combine two claims.

    Findingcitation

    An A1C range of 6.0-6.5% had a 5-year risk of developing diabetes between 25 and 50% and relative risk 20 times higher compared with an A1C of 5.0%.

    “An A1C range of 6.0--6.5% had a 5-year risk of developing diabetes between 25 and 50% and relative risk 20 times higher compared with an A1C of 5.0% (10).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [10] Zhang, 2010, A1C level and future risk of diabetes: a systematic review, Diabetes Care source

      Not checked in the free run.

  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Certain toxins such as Vacor and intravenous pentamidine can permanently destroy pancreatic β-cells.

    “Certain toxins such as Vacor (a rat poison) and intravenous pentamidine can permanently destroy pancreatic β-cells.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingnone given

    Stiff-man syndrome is an autoimmune disorder of the central nervous system characterized by stiffness of the axial muscles with painful spasms; patients usually have high titers of GAD autoantibodies, and approximately one-third will develop diabetes.

    “The stiff-man syndrome is an autoimmune disorder of the central nervous system characterized by stiffness of the axial muscles with painful spasms. Patients usually have high titers of the GAD autoantibodies, and approximately one-third will develop diabetes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Findingnone given

    Many genetic syndromes are accompanied by an increased incidence of diabetes, including the chromosomal abnormalities of Down syndrome, Klinefelter syndrome, and Turner syndrome.

    “Many genetic syndromes are accompanied by an increased incidence of diabetes. These include the chromosomal abnormalities of Down syndrome, Klinefelter syndrome, and Turner syndrome.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Many drugs can impair insulin secretion; these drugs may not cause diabetes by themselves, but they may precipitate diabetes in individuals with insulin resistance.

    “Many drugs can impair insulin secretion. These drugs may not cause diabetes by themselves, but they may precipitate diabetes in individuals with insulin resistance.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingnone given

    Approximately 7% of all pregnancies (ranging from 1 to 14%, depending on the population studied and the diagnostic tests employed) are complicated by GDM, resulting in more than 200,000 cases annually.

    “Approximately 7% of all pregnancies (ranging from 1 to 14%, depending on the population studied and the diagnostic tests employed) are complicated by GDM, resulting in more than 200,000 cases annually.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Anti-insulin receptor antibodies can cause diabetes by binding to the insulin receptor, thereby blocking the binding of insulin to its receptor in target tissues; in some cases, these antibodies can act as an insulin agonist after binding to the receptor and can thereby cause hypoglycemia.

    “Anti-insulin receptor antibodies can cause diabetes by binding to the insulin receptor, thereby blocking the binding of insulin to its receptor in target tissues. However, in some cases, these antibodies can act as an insulin agonist after binding to the receptor and can thereby cause hypoglycemia.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Genetic abnormalities that result in the inability to convert proinsulin to insulin have been identified in a few families, and such traits are inherited in an autosomal dominant pattern; the resultant glucose intolerance is mild.

    “Genetic abnormalities that result in the inability to convert proinsulin to insulin have been identified in a few families, and such traits are inherited in an autosomal dominant pattern. The resultant glucose intolerance is mild.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    Point mutations in mitochondrial DNA have been found to be associated with diabetes and deafness.

    “Point mutations in mitochondrial DNA have been found to be associated with diabetes and deafness”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Findingnone given

    The metabolic abnormalities associated with mutations of the insulin receptor may range from hyperinsulinemia and modest hyperglycemia to severe diabetes.

    “The metabolic abnormalities associated with mutations of the insulin receptor may range from hyperinsulinemia and modest hyperglycemia to severe diabetes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Findingnone given

    Diabetes occurs in patients with congenital rubella, although most of these patients have HLA and immune markers characteristic of type 1 diabetes.

    “Diabetes occurs in patients with congenital rubella, although most of these patients have HLA and immune markers characteristic of type 1 diabetes.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingnone given

    Diabetes caused by hormone excess generally occurs in individuals with preexisting defects in insulin secretion, and hyperglycemia typically resolves when the hormone excess is resolved.

    “This generally occurs in individuals with preexisting defects in insulin secretion, and hyperglycemia typically resolves when the hormone excess is resolved.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    In type 1 diabetes, the cause is an absolute deficiency of insulin secretion.

    “In one category, type 1 diabetes, the cause is an absolute deficiency of insulin secretion.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisereasoning

    Assigning a type of diabetes to an individual often depends on the circumstances present at the time of diagnosis, and many diabetic individuals do not easily fit into a single class.

    “Assigning a type of diabetes to an individual often depends on the circumstances present at the time of diagnosis, and many diabetic individuals do not easily fit into a single class.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    The basis of abnormalities in carbohydrate, fat, and protein metabolism in diabetes is deficient action of insulin on target tissues.

    “The basis of the abnormalities in carbohydrate, fat, and protein metabolism in diabetes is deficient action of insulin on target tissues.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Type 2 diabetes encompasses individuals who have insulin resistance and usually have relative (rather than absolute) insulin deficiency.

    “This form of diabetes, which accounts for ∼90–95% of those with diabetes, previously referred to as non–insulin-dependent diabetes, type 2 diabetes, or adult-onset diabetes, encompasses individuals who have insulin resistance and usually have relative (rather than absolute) insulin deficiency”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Premisenone given

    The vast majority of cases of diabetes fall into two broad etiopathogenetic categories.

    “The vast majority of cases of diabetes fall into two broad etiopathogenetic categories (discussed in greater detail below).”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based). May combine two claims.

    Premisenone given

    Impairment of insulin secretion and defects in insulin action frequently coexist in the same patient, and it is often unclear which abnormality, if either alone, is the primary cause of hyperglycemia.

    “Impairment of insulin secretion and defects in insulin action frequently coexist in the same patient, and it is often unclear which abnormality, if either alone, is the primary cause of the hyperglycemia.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Deficient insulin action results from inadequate insulin secretion and/or diminished tissue responses to insulin at one or more points in the pathways of hormone action.

    “Deficient insulin action results from inadequate insulin secretion and/or diminished tissue responses to insulin at one or more points in the complex pathways of hormone action.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    Several pathogenic processes are involved in the development of diabetes, ranging from autoimmune destruction of pancreatic β-cells with consequent insulin deficiency to abnormalities causing insulin resistance.

    “Several pathogenic processes are involved in the development of diabetes. These range from autoimmune destruction of the β-cells of the pancreas with consequent insulin deficiency to abnormalities that result in resistance to insulin action.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Insulin secretion is defective in patients with type 2 diabetes and insufficient to compensate for insulin resistance.

    “Thus, insulin secretion is defective in these patients and insufficient to compensate for insulin resistance.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    In type 2 diabetes, the cause is a combination of resistance to insulin action and an inadequate compensatory insulin secretory response.

    “In the other, much more prevalent category, type 2 diabetes, the cause is a combination of resistance to insulin action and an inadequate compensatory insulin secretory response.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Premisereasoning

    Several hormones (e.g., growth hormone, cortisol, glucagon, epinephrine) antagonize insulin action, and excess amounts of these hormones can cause diabetes.

    “Several hormones (e.g., growth hormone, cortisol, glucagon, epinephrine) antagonize insulin action. Excess amounts of these hormones (e.g., acromegaly, Cushing's syndrome, glucagonoma, pheochromocytoma, respectively) can cause diabetes.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisenone given

    For many years, GDM has been defined as any degree of glucose intolerance with onset or first recognition during pregnancy.

    “For many years, GDM has been defined as any degree of glucose intolerance with onset or first recognition during pregnancy.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    The International Expert Committee recommended the use of the A1C test to diagnose diabetes, with a threshold of ≥6.5%, and ADA affirms this decision.

    “In their recent report (3), an International Expert Committee, after an extensive review of both established and emerging epidemiological evidence, recommended the use of the A1C test to diagnose diabetes, with a threshold of ≥6.5%, and ADA affirms this decision.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [3] International Expert Committee, 2009, International Expert Committee report on the role of the A1C assay in the diagnosis of diabetes, Diabetes Care source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Premisenone given

    A1C is a widely used marker of chronic glycemia, reflecting average blood glucose levels over a 2- to 3-month period of time.

    “A1C is a widely used marker of chronic glycemia, reflecting average blood glucose levels over a 2- to 3-month period of time.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    The established glucose criteria for the diagnosis of diabetes remain valid, including FPG and 2-h PG.

    “The established glucose criteria for the diagnosis of diabetes remain valid. These include the FPG and 2-h PG.”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Premisenone given

    Prior Expert Committees have not recommended use of the A1C for diagnosis of diabetes, in part due to lack of standardization of the assay.

    “Prior Expert Committees have not recommended use of the A1C for diagnosis of diabetes, in part due to lack of standardization of the assay.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisereasoning

    The A1C has several advantages to the FPG, including greater convenience, greater preanalytical stability, and less day-to-day perturbations during periods of stress and illness.

    “Moreover, the A1C has several advantages to the FPG, including greater convenience, since fasting is not required, evidence to suggest greater preanalytical stability, and less day-to-day perturbations during periods of stress and illness.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisenone given

    A1C correlates well with both microvascular and, to a lesser extent, macrovascular complications and is widely used as the standard biomarker for the adequacy of glycemic management.

    “The test plays a critical role in the management of the patient with diabetes, since it correlates well with both microvascular and, to a lesser extent, macrovascular complications and is widely used as the standard biomarker for the adequacy of glycemic management.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    The 2003 ADA Expert Committee report reduced the lower FPG cut point to define IFG from 110 mg/dl (6.1 mmol/l) to 100 mg/dl (5.6 mmol/l), in part to ensure that prevalence of IFG was similar to that of IGT.

    “It should be noted that the 2003 ADA Expert Committee report reduced the lower FPG cut point to define IFG from 110 mg/dl (6.1 mmol/l) to 100 mg/dl (5.6 mmol/l), in part to ensure that prevalence of IFG was similar to that of IGT.”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [1] 1997, Expert Committee on the Diagnosis and Classification of Diabetes Mellitus. Report of the Expert Committee on the Diagnosis and Classification of Diabetes Mellitus, Diabetes Care source

      Not checked in the free run.

    • cites [2] Genuth, 2003, Follow-up report on the diagnosis of diabetes mellitus, Diabetes Care source

      Not checked in the free run.

  • May combine two claims.

    Interpretationreasoning

    An A1C range of 5.7-6.4% identifies individuals with high risk for future diabetes, to whom the term prediabetes may be applied.

    “Hence, it is reasonable to consider an A1C range of 5.7--6.4% as identifying individuals with high risk for future diabetes, to whom the term prediabetes may be applied.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationreasoning

    As A1C is used more commonly to diagnose diabetes in individuals with risk factors, it will also identify those at higher risk for developing diabetes in the future.

    “As A1C is used more commonly to diagnose diabetes in individuals with risk factors, it will also identify those at higher risk for developing diabetes in the future.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Interpretationnone given

    IFG and IGT are risk factors for diabetes as well as cardiovascular disease.

    “IFG and IGT should not be viewed as clinical entities in their own right but rather risk factors for diabetes as well as cardiovascular disease.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Interpretationreasoning

    It is conceivable that the lower sensitivity of A1C at the designated cut point will be offset by the test's greater practicality, and that wider application of A1C may increase the number of diagnoses made.

    “Thus, it is conceivable that the lower sensitivity of A1C at the designated cut point will be offset by the test's greater practicality, and that wider application of a more convenient test (A1C) may actually increase the number of diagnoses made.”
    Quote in the paperNot a substantial claim
    • Rests on an assumption: In practice, a large portion of the population with type 2 diabetes remains unaware of their condition.
  • Probably not a substantial claim: may not pass S4 (based).

    Interpretationnone given

    The same test repeated for confirmation has a greater likelihood of concurrence.

    “It is preferable that the same test be repeated for confirmation, since there will be a greater likelihood of concurrence in this case.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    The new GDM criteria will significantly increase the prevalence of GDM, primarily because only one abnormal value, not two, is sufficient to make the diagnosis.

    “These new criteria will significantly increase the prevalence of GDM, primarily because only one abnormal value, not two, is sufficient to make the diagnosis.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Interpretationnone given

    In most circumstances the nondiabetic test is likely to be in a range very close to the threshold that defines diabetes.

    “Admittedly, in most circumstance the “nondiabetic” test is likely to be in a range very close to the threshold that defines diabetes.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationnone given

    When a test above the diagnostic threshold is repeated, the second value is least likely to be below the cut point for A1C, somewhat more likely for FPG, and most likely for 2-h PG.

    “This is least likely for A1C, somewhat more likely for FPG, and most likely for the 2-h PG.”
    Quote in the paperNot a substantial claim
75 of 75
  • The authors state this as an assumption.

    In insulin-resistant lipoatrophic diabetes, the lesion(s) must reside in the postreceptor signal transduction pathways.

    “Therefore, it is assumed that the lesion(s) must reside in the postreceptor signal transduction pathways.”
  • The paper relies on this without support.

    Structured lifestyle intervention aimed at increasing physical activity and producing 5–10% loss of body weight, and certain pharmacological agents, prevent or delay the development of diabetes in people with IGT.

    “Structured lifestyle intervention, aimed at increasing physical activity and producing 5–10% loss of body weight, and certain pharmacological agents have been demonstrated to prevent or delay the development of diabetes in people with IGT; the potential impact of such interventions to reduce mortality or the incidence of cardiovascular disease has not been demonstrated to date.”
  • The paper relies on this without support.

    A1C assays are now highly standardized so that their results can be uniformly applied both temporally and across populations.

    “However, A1C assays are now highly standardized so that their results can be uniformly applied both temporally and across populations.”
  • The paper relies on this without support.

    Point-of-care A1C assays are not sufficiently accurate at this time to use for diagnostic purposes.

    “Point-of-care A1C assays are not sufficiently accurate at this time to use for diagnostic purposes.”
  • The paper relies on this without support.

    The A1C can be misleading in patients with certain forms of anemia and hemoglobinopathies.

    “In addition, the A1C can be misleading in patients with certain forms of anemia and hemoglobinopathies, which may also have unique ethnic or geographic distributions.”
  • The paper relies on this without support.

    In practice, a large portion of the population with type 2 diabetes remains unaware of their condition.

    “However, in practice, a large portion of the population with type 2 diabetes remains unaware of their condition.”
  • The paper relies on this without support.

    GDM carries risks for the mother and neonate.

    “GDM carries risks for the mother and neonate.”
  • The paper relies on this without support.

    There are few data from randomized clinical trials regarding therapeutic interventions in women who will now be diagnosed with GDM based on only one blood glucose value above the specified cut points.

    “Admittedly, there are few data from randomized clinical trials regarding therapeutic interventions in women who will now be diagnosed with GDM based on only one blood glucose value above the specified cut points (in contrast to the older criteria that stipulated at least two abnormal values).”
8 of 8

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • HbA1c at or above 6.5%, suggested for diabetes diagnosis in the general population, may be particularly helpful in Cushing syndrome because it integrates glucose homeostasis.

    “HbAc levels $.%, suggested for the diagnosis of DM in the general population, may be particularly helpful in the clinical setting of CS because this parameter is an integrated measure of glucose homeostasis ().”

Cites

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Authors
American Diabetes Association
Corresponding author
American Diabetes Association
Venue
Diabetes Care
Published
2012-12-10
Volume
36
Issue
Supplement_1
Pages
S67-S74
ISSN
  • 0149-5992 (ISSN-L)
  • 1935-5548
OpenAlex
W4241151929
Cited by
2,245
References
16
Citations by year
2026: 56 · 2025: 122 · 2024: 180 · 2023: 235 · 2022: 250 · 2021: 191 · 2020: 180 · 2019: 132 · 2018: 108 · 2017: 121 · 2016: 150 · 2015: 198 · 2014: 212 · 2013: 99 · 2012: 6
FWCI
132.43
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • Diabetes Care (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes Management and Research
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Diabetes, Cardiovascular Risks, and Lipoproteins
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Diabetes and associated disorders
Keywords
diabetes mellitus, diagnosis, classification, hyperglycemia, insulin secretion, insulin resistance, metabolic disorders, diabetes complications
MeSH terms
Diabetes Mellitus, Female, Humans, Male, Pregnancy

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Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Claims read by deepseek-v4.1-flash under definition version 3 (extract-v3) on 2026-10-09.

Classified by jev-1.13-20260917 (gold-guideline-v0.2) on 2026-10-09.

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