Cited by 15Adrenal Hormones and DisordersAdrenal and Paraganglionic TumorsPituitary Gland Disorders and Treatments

The diagnostic value of salivary cortisol and salivary cortisone in patients with suspected hypercortisolism

Open access
Berndt, Vendela, Dahlqvist, Per, de Verdier, Jennie, Ryberg, Henrik, Ragnarsson, Oskar·2022·Frontiers in Endocrinology

Abstract

Background: Diagnosing endogenous hypercortisolism remains a challenge, partly due to a lack of biochemical tests with good diagnostic accuracy. Objectives: To evaluate the diagnostic value of salivary cortisol and cortisone in patients with suspected hypercortisolism. Methods: Retrospective study including 155 patients with adrenal incidentaloma, and 54 patients with suspected Cushing´s syndrome (CS). Salivary samples were collected at home, at 11 p.m., and at 8 a.m. following an over-night dexamethasone suppression test (DST). Salivary cortisol and cortisone were measured with liquid chromatography-tandem mass spectrometry. Results: Ten of 155 patients with adrenal incidentaloma were considered to have autonomous cortisol secretion (ACS). Using previously established cut-offs, all patients with ACS had elevated plasma-cortisol (>50 nmol/L) following DST, 9/10 had elevated late-night salivary cortisone (>15 nmol/L) whereas only 4/10 had elevated late-night salivary cortisol (LNSC; >3 nmol/L) compared to 35%, 9% and 8%, respectively, of the 145 patients with non-functioning adrenal incidentaloma. Six (60%) patents with ACS had elevated salivary cortisol and cortisone at 8 a.m. following DST compared to 9% and 8%, respectively, of patients with non-functioning adrenal incidentaloma. One of 6 patients with overt CS had a normal LNSC and one had normal late-night salivary cortisone, while all had increased salivary cortisol and cortisone following DST. Conclusion: LNSC is not sufficiently sensitive or specific to be used for screening patients with suspected hypercortisolism. Instead, late-night salivary cortisone seems to be a promising alternative in patients with adrenal incidentaloma and salivary cortisone at 8 a.m. following DST in patients with suspected CS. Larger studies are needed to confirm these findings.

AI snapshot

Written from the paper’s full text.

TL;DR

In a retrospective study of patients with adrenal incidentaloma or suspected Cushing’s syndrome, late-night salivary cortisol (LNSC) had low sensitivity for autonomous cortisol secretion (ACS), while late-night salivary cortisone and post-dexamethasone salivary cortisol/cortisone showed better diagnostic performance. The authors conclude LNSC alone is not sufficient for screening suspected hypercortisolism, but salivary cortisone is promising and needs larger confirmatory studies.

Key findings

  • Among 155 patients with adrenal incidentaloma, 10 had ACS. Late-night salivary cortisone >15 nmol/L identified 9/10 ACS patients (90% sensitivity, 91% specificity), whereas LNSC >3 nmol/L identified only 4/10 (40% sensitivity, 92% specificity); post-DST plasma cortisol >50 nmol/L identified 10/10 but had 65% specificity.
  • In 54 patients with suspected Cushing’s syndrome, CS was confirmed in 7. Post-DST salivary cortisone >5 nmol/L had 100% sensitivity and 91% specificity, post-DST salivary cortisol >1 nmol/L had 100% sensitivity and 84% specificity, and LNSC >3 nmol/L had 83% sensitivity and 91% specificity.
  • One patient with CS had normal LNSC and one had normal late-night salivary cortisone, but all seven patients with CS had elevated salivary cortisol and cortisone at 8 a.m. following DST.
  • The authors conclude LNSC is not sufficiently sensitive or specific for screening suspected hypercortisolism, while late-night salivary cortisone in adrenal incidentaloma and post-DST salivary cortisone in suspected CS appear promising.

Methods

  • Retrospective single-center study at Sahlgrenska University Hospital including patients who provided salivary samples between April 2018 and November 2020; final analysis included 155 patients with adrenal incidentaloma and 54 with suspected Cushing’s syndrome.
  • Patients collected home saliva samples at 11 p.m. and at 8 a.m. after a 1-mg overnight dexamethasone suppression test (DST); salivary cortisol and cortisone were measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS), with contamination assessed by salivary cortisol:cortisone ratio.
  • ACS diagnosis was based on real-life clinical assessment without predefined criteria; CS diagnosis required clinical symptoms plus at least two biochemical screening tests showing hypercortisolism. ROC/AUC analyses were performed, with DeLong tests comparing salivary tests against post-DST plasma cortisol.

Limitations

  • The paper states limitations including the limited number of patients, especially those finally diagnosed with CS; inconsistent collection of two or more saliva samples in all suspected CS patients; retrospective design with no predefined ACS criteria and diagnosis by several physicians, risking diagnostic inconsistency; clinicians were not blinded to salivary results; and plasma dexamethasone was not measured.
  • Evident from the text: the single-center retrospective design and reliance on clinical diagnosis may limit generalizability, and the very small ACS and CS groups make sensitivity and specificity estimates imprecise.

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

Integrity signals

Registry

Crossref · 10.3389/fendo.2022.1028804

Cites

24 of 24 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Claims the paper makes

0 of 63 cited sources checked · 0 supported · 0 flagged

  • Findingown data

    One patient with CS had P-cortisol <138 nmol/L following DST.

    “One patient with CS had P-cortisol <138 nmol/L following DST, one had normal LNSC and one had normal late-night salivary cortisone”
    Quote in the paperNot a substantial claim
  • Findingown data

    Among patients with non-functioning adrenal incidentaloma, 8% had elevated salivary cortisone at 8 a.m. following DST.

    “compared to 9% and 8%, respectively, of patients with non-functioning adrenal incidentaloma.”
    Quote in the paperNot a substantial claim
  • Findingown data

    9 of 10 patients with ACS had elevated late-night salivary cortisone (>15 nmol/L).

    “9/10 had elevated late-night salivary cortisone (>15 nmol/L)”
    Quote in the paperSubstantial claim
  • Findingown data

    Among patients with adrenal incidentaloma and P-cortisol >138 nmol/L after DST (n=15), 40% had salivary cortisol at 8 a.m. following DST >1 nmol/L.

    “6 (40%) had salivary cortisol at 8 a.m. following DST >1 nmol/L”
    Quote in the paperSubstantial claim
  • Findingown data

    6 of 10 patients with ACS had elevated salivary cortisol at 8 a.m. following DST.

    “Six (60%) patents with ACS had elevated salivary cortisol and cortisone at 8 a.m. following DST”
    Quote in the paperSubstantial claim
  • The quote only partly states this claim. 1
  • Classified as probably not a substantial claim. 22
  • May combine two claims. 17
  • The quote only partly states this claim.

    Findingown data

    Among the 145 patients with non-functioning adrenal incidentaloma, 8% had LNSC >3 nmol/L.

    “Eleven of 143 (8%) patients with non-functioning adrenal adenoma had LNSC >3 nmol/L”
    Quote in the paperNot a substantial claim
  • Classified as probably not a substantial claim.

    Findingown data

    In total, 54 patients with suspected CS were included in the analysis.

    “In total, 54 patients, 45 women (87%) and 9 men (13%), with suspected CS were included in the analysis.”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Findingown data

    Of the 7 confirmed CS patients, 4 had Cushing's disease, two had cortisol-producing adrenal adenoma, and one had ectopic CS.

    “CS was ruled out in 47 (87%) patients and confirmed in 7 (13%) patients, 4 with Cushing’s disease, two with cortisol-producing adrenal adenoma and one with ectopic CS”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Findingown data

    The specificity of Sa-cortisol and Sa-cortisone following DST for ACS was 91% and 92%, respectively.

    “Sa-cortisol and Sa-cortisone were inadequately suppressed following DST in 6 of 10 patients with ACS, whereas inadequate suppression of Sa-cortisol and Sa-cortisone was found only in 9 and 8%, respectively, of patients with non-functioning adrenal incidentalomas, giving a specificity of 91/92%.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.
  • May combine two claims.

    Findingown data

    In patients with non-functioning adrenal incidentalomas, inadequate suppression of Sa-cortisol and Sa-cortisone following DST was found in 9% and 8%, respectively.

    “Sa-cortisol and Sa-cortisone were inadequately suppressed following DST in 6 of 10 patients with ACS, whereas inadequate suppression of Sa-cortisol and Sa-cortisone was found only in 9 and 8%, respectively, of patients with non-functioning adrenal incidentalomas, giving a specificity of 91/92%.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.
  • May combine two claims.

    Premisecitation

    Salivary cortisone at 11 p.m., as well as salivary cortisol and cortisone at 8 a.m. following 1-mg overnight DST, all have high diagnostic accuracy for CS.

    “We have recently demonstrated that salivary cortisone at 11 p.m., as well as salivary cortisol and cortisone at 8 a.m. following 1-mg overnight DST, all have high diagnostic accuracy for CS (17).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [17] Backlund, 2020, Reference intervals of salivary cortisol and cortisone and their diagnostic accuracy in cushing's syndrome, Eur J Endocrinol source

      Not checked in the free run.

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

    Premisecitation

    Upon clinical suspicion of CS, current guidelines recommend biochemical screening with either a 1 mg overnight DST, 24-hour urinary free-cortisol or LNSC.

    “Upon clinical suspicion of CS, current guidelines recommend biochemical screening with either a 1 mg overnight dexamethasone suppression test (DST), 24-hour urinary free-cortisol or late-night salivary cortisol (LNSC) (2).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [2] Nieman, 2008, The diagnosis of cushing's syndrome: An endocrine society clinical practice guideline, J Clin Endocrinol Metab source

      Not checked in the free run.

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

    Premisecitation

    LC-MS/MS has only been used three times before for measuring LNSC in patients with adrenal incidentaloma.

    “To our knowledge, LC-MS/MS has only been used three times before for measuring LNSC in patients with adrenal incidentaloma (12, 15, 16).”
    Quote in the paperNot a substantial claim0 of 3 sources checked
    • cites [12] Palmieri, 2013, The role of salivary cortisol measured by liquid chromatography-tandem mass spectrometry in the diagnosis of subclinical hypercortisolism, Eur J Endocrinol source

      Not checked in the free run.

    • cites [15] Ueland, 2020, Diagnostic testing of autonomous cortisol secretion in adrenal incidentalomas, Endocr Connect source

      Not checked in the free run.

    • cites [16] Ceccato, 2018, Daily salivary cortisol and cortisone rhythm in patients with adrenal incidentaloma, Endocrine source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Premisecitation

    The limited number of studies published to date have shown that LNSC has a relatively low sensitivity for predicting ACS, and subsequently conclude that the test is not suitable for screening of this disorder.

    “The limited number of studies published to date have shown that LNSC has a relatively low sensitivity for predicting ACS, and subsequently conclude that the test is not suitable for screening of this disorder (11–16).”
    Quote in the paperSubstantial claim0 of 6 sources checked
    • cites [11] Masserini, 2009, The limited role of midnight salivary cortisol levels in the diagnosis of subclinical hypercortisolism in patients with adrenal incidentaloma, Eur J Endocrinol source

      Not checked in the free run.

    • cites [12] Palmieri, 2013, The role of salivary cortisol measured by liquid chromatography-tandem mass spectrometry in the diagnosis of subclinical hypercortisolism, Eur J Endocrinol source

      Not checked in the free run.

    • cites [13] Ceccato, 2017, First-line screening tests for cushing's syndrome in patients with adrenal incidentaloma: The role of urinary free cortisol measured by LC-MS/MS, J Endocrinol Invest source

      Not checked in the free run.

    • cites [14] Araujo-Castro, 2021, Diagnostic accuracy of the different hormonal tests used for the diagnosis of autonomous cortisol secretion, Sci Rep source

      Not checked in the free run.

    • cites [15] Ueland, 2020, Diagnostic testing of autonomous cortisol secretion in adrenal incidentalomas, Endocr Connect source

      Not checked in the free run.

    • cites [16] Ceccato, 2018, Daily salivary cortisol and cortisone rhythm in patients with adrenal incidentaloma, Endocrine source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductreasoning

    No predefined diagnostic criteria for ACS were used; instead, the diagnosis was provided through a real-life clinical assessment made by the treating endocrinologist.

    “Therefore, in this study, no predefined diagnostic criteria were used. Instead, the diagnosis was provided through a real-life clinical assessment made by the treating endocrinologist.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The real-life clinical assessment made by the treating endocrinologist correctly classifies patients with adrenal incidentaloma as having ACS or non-functioning adrenal incidentaloma.
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    In a recent study from Norway, salivary cortisone at 8 a.m. following 1-mg overnight DST was found to be useful in patients with hypercortisolism, both CS and ACS.

    “Also, in a recent study from Norway, salivary cortisone at 8 a.m. following 1-mg overnight DST was found to be useful in patients with hypercortisolism, both CS and ACS (18).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [18] Ueland, 2017, Simultaneous assay of cortisol and dexamethasone improved diagnostic accuracy of the dexamethasone suppression test, Eur J Endocrinol source

      Not checked in the free run.

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

    Study design and conductown data

    Salivary cortisol and cortisone concentrations were measured by liquid chromatography-tandem mass spectrometry with coefficients of variation of 6% for cortisol and 7% for cortisone.

    “The coefficients of variation were 6% for cortisol at concentrations between 2.2 and 18.4 nmol/L and 7% for cortisone at concentrations between 4.7 and 26.8 nmol/L.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premiseown data

    The upper limit of normal for UFC used in this study was 136 nmol/L.

    “The upper limit of normal for UFC was 136 nmol/L.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    In general, p-cortisol following DST <50 nmol/L was considered to exclude hypercortisolism.

    “In general, p-cortisol following DST <50 nmol/L was considered to exclude hypercortisolism, while values >138 nmol/L were considered to be highly suggestive for hypercortisolism (1, 2).”
    Quote in the paperNot a substantial claim0 of 2 sources checked
    • cites [1] Fassnacht, 2016, Management of adrenal incidentalomas: European society of endocrinology clinical practice guideline in collaboration with the European network for the study of adrenal tumors, Eur J Endocrinol source

      Not checked in the free run.

    • cites [2] Nieman, 2008, The diagnosis of cushing's syndrome: An endocrine society clinical practice guideline, J Clin Endocrinol Metab source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductcitation

    Contamination with exogenous hydrocortisone or blood in salivary samples was determined by calculating the salivary-cortisol:cortisone ratio, and samples with a ratio over the 97.5 percentile for the whole cohort (1.0) were considered contaminated.

    “Contamination with exogenous hydrocortisone, or blood, in the salivary samples was determined by calculating the salivary-cortisol:cortisone ratio as previously described (17). Samples with a ratio over the 97.5 percentile for the whole cohort (1.0) were considered to be contaminated.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [17] Backlund, 2020, Reference intervals of salivary cortisol and cortisone and their diagnostic accuracy in cushing's syndrome, Eur J Endocrinol source

      Not checked in the free run.

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

    Premisecitation

    For patients with adrenal incidentaloma, DST is the most commonly recommended first-line screening test for ACS.

    “For patients with adrenal incidentaloma, DST is the most commonly recommended first-line screening test for ACS (1–5).”
    Quote in the paperNot a substantial claim0 of 5 sources checked
    • cites [1] Fassnacht, 2016, Management of adrenal incidentalomas: European society of endocrinology clinical practice guideline in collaboration with the European network for the study of adrenal tumors, Eur J Endocrinol source

      Not checked in the free run.

    • cites [2] Nieman, 2008, The diagnosis of cushing's syndrome: An endocrine society clinical practice guideline, J Clin Endocrinol Metab source

      Not checked in the free run.

    • cites [3] Yanase, 2018, New diagnostic criteria of adrenal subclinical cushing's syndrome: Opinion from the Japan endocrine society, Endocr J source

      Not checked in the free run.

    • cites [4] Zeiger, 2009, American Association of clinical endocrinologists and American association of endocrine surgeons medical guidelines for the management of adrenal incidentalomas: executive summary of recommendations, Endocr Pract source

      Not checked in the free run.

    • cites [5] Lee, 2017, Clinical guidelines for the management of adrenal incidentaloma, Endocrinol Metab (Seoul) source

      Not checked in the free run.

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

    Premiseown data

    The lower limit of normal for p-ACTH used in this study was 2.0 pmol/L.

    “The lower limit of normal for p-ACTH was 2.0 pmol/L.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    Sa-cortisol and/or Sa-cortisone following DST are promising diagnostic tools in patients with adrenal incidentaloma as well as patients with suspected CS.

    “Thus, Sa-cortisol and/or Sa-cortisone following DST are promising diagnostic tools in patients with adrenal incidentaloma as well as patients with suspected CS.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.
  • Probably not a substantial claim: may not pass S3 (load-bearing), S4 (based).

    Study design and conductnone given

    Measuring Sa-cortisol and Sa-cortisone simultaneously enables detection of contamination by exogenous hydrocortisone in the samples.

    “In addition, measuring Sa-cortisol and Sa-cortisone simultaneously enables detection of contamination by exogenous hydrocortisone in the samples.”
    Quote in the paperNot a substantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Study design and conductreasoning

    Elevated P-cortisol following DST is often required for diagnosing ACS, which may have contributed to the high sensitivity of this test.

    “In addition, elevated P-cortisol following DST is often required for diagnosing ACS, which inevitably may have contributed to the high sensitivity of this test.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationreasoning

    LNSC does not by itself seem to be sufficiently sensitive to screen patients with suspected hypercortisolism, neither in patients with adrenal incidentalomas, nor in patients with suspected CS.

    “In conclusion, LNSC does not by itself seem to be sufficiently sensitive to screen patients with suspected hypercortisolism, neither in patients with adrenal incidentalomas, nor in patients with suspected CS.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.
  • Probably not a substantial claim: may not pass S3 (load-bearing). May combine two claims.

    Premisecitation

    There is no international consensus on how ACS in patients with adrenal incidentalomas should be diagnosed, and different recommendations have been provided.

    “Currently, there is no international consensus on how ACS in patients with adrenal incidentalomas should be diagnosed, and different recommendations have been provided (1–5, 21–23).”
    Quote in the paperNot a substantial claim0 of 8 sources checked
    • cites [1] Fassnacht, 2016, Management of adrenal incidentalomas: European society of endocrinology clinical practice guideline in collaboration with the European network for the study of adrenal tumors, Eur J Endocrinol source

      Not checked in the free run.

    • cites [2] Nieman, 2008, The diagnosis of cushing's syndrome: An endocrine society clinical practice guideline, J Clin Endocrinol Metab source

      Not checked in the free run.

    • cites [3] Yanase, 2018, New diagnostic criteria of adrenal subclinical cushing's syndrome: Opinion from the Japan endocrine society, Endocr J source

      Not checked in the free run.

    • cites [4] Zeiger, 2009, American Association of clinical endocrinologists and American association of endocrine surgeons medical guidelines for the management of adrenal incidentalomas: executive summary of recommendations, Endocr Pract source

      Not checked in the free run.

    • cites [5] Lee, 2017, Clinical guidelines for the management of adrenal incidentaloma, Endocrinol Metab (Seoul) source

      Not checked in the free run.

    • cites [21] Grumbach, 2003, Management of the clinically inapparent adrenal mass ("incidentaloma"), Ann Intern Med source

      Not checked in the free run.

    • cites [22] Fleseriu, 2021, Consensus on diagnosis and management of cushing's disease: a guideline update, Lancet Diabetes Endocrinol source

      Not checked in the free run.

    • cites [23] Tabarin, 2022, Consensus statement by the French society of endocrinology (SFE) and French society of pediatric endocrinology & diabetology (SFEDP) on diagnosis of cushing's syndrome, Ann Endocrinol (Paris) source

      Not checked in the free run.

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

    Premisecitation

    P-cortisol >138 nmol/L following DST has been suggested for diagnosis of ACS by the National Institute of Health.

    “P-cortisol >138 nmol/L following DST has been suggested for diagnosis of ACS by the National Institute of Health (21).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [21] Grumbach, 2003, Management of the clinically inapparent adrenal mass ("incidentaloma"), Ann Intern Med source

      Not checked in the free run.

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

    Premisecitation

    In a recent meta-analysis including 139 studies, the accuracy of laboratory tests for CS was investigated.

    “In a recent meta-analysis including 139 studies, the accuracy of laboratory tests for CS was investigated (24).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [24] Galm, 2020, Accuracy of laboratory tests for the diagnosis of cushing syndrome, J Clin Endocrinol Metab source

      Not checked in the free run.

  • Classified as probably not a substantial claim. May combine two claims.

    Study design and conductreasoning

    Both salivary cortisol and cortisone were measured, enabling calculation of the cortisol:cortisone ratio and evaluation if the samples were contaminated with exogenous cortisol (hydrocortisone).

    “Furthermore, both salivary cortisol and cortisone were measured, enabling calculation of the cortisol:cortisone ratio and evaluation if the samples were contaminated with exogenous cortisol (hydrocortisone).”
    Quote in the paperSubstantial claim
  • May combine two claims.

    Premisecitation

    In that study, 13 of 25 patients with ACS had elevated post-DST Sa-cortisol and 23 of 25 had elevated Sa-cortisone, with 90% and 82% specificity, respectively.

    “In that study, 13 of 25 patients with ACS had elevated post-DST Sa-cortisol and 23 of 25 had elevated Sa-cortisone, with 90% and 82% specificity, respectively.”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [18] Ueland, 2017, Simultaneous assay of cortisol and dexamethasone improved diagnostic accuracy of the dexamethasone suppression test, Eur J Endocrinol source

      Not checked in the free run.

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

    Study design and conductreasoning

    Due to the retrospective design, the diagnostic criteria for ACS was not predefined.

    “Also, due to the retrospective design, the diagnostic criteria for ACS was not predefined.”
    Quote in the paperNot a substantial claim
  • May combine two claims.

    Interpretationown data

    Sa-cortisone at 11 p.m. and salivary cortisol and cortisone following DST seem to be promising tests in the same context.

    “However, Sa-cortisone at 11 p.m. and salivary cortisol and cortisone following DST seem to be promising tests in the same context.”
    Quote in the paperSubstantial claim
    • Rests on an assumption: The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Study design and conductnone given

    P-dexamethasone was not measured in our study.

    “Finally, P-dexamethasone, analysed together with P-cortisol in association with DST, in order to decrease the number of false positive results (18), was not measured in our study.”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [18] Ueland, 2017, Simultaneous assay of cortisol and dexamethasone improved diagnostic accuracy of the dexamethasone suppression test, Eur J Endocrinol source

      Not checked in the free run.

  • Classified as probably not a substantial claim.

    Study design and conductreasoning

    The diagnosis was based on clinical findings and results from different cortisol measurements, i.e., a real-life assessment made by several physicians responsible for each patient.

    “Instead, the diagnosis was based on clinical findings and results from the different cortisol measurement, i.e., a real-life assessment made by several physicians responsible for each patient.”
    Quote in the paperSubstantial claim
  • Probably not a substantial claim: may not pass S3 (load-bearing).

    Premisecitation

    Sa-cortisol and Sa-cortisone at 8 a.m. following DST has only been studied once before in the context of screening for ACS.

    “Sa-cortisol and Sa-cortisone at 8 a.m. following DST has to our knowledge only been studied once before in the context of screening for ACS (18).”
    Quote in the paperNot a substantial claim0 of 1 sources checked
    • cites [18] Ueland, 2017, Simultaneous assay of cortisol and dexamethasone improved diagnostic accuracy of the dexamethasone suppression test, Eur J Endocrinol source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    Analysis of Sa-cortisol and Sa-cortisone following DST has been used in two previous studies to screen patients with suspected CS, both showing high sensitivity (95-100%) and specificity (80-95%).

    “Analysis of Sa-cortisol and Sa-cortisone following DST has also been used in two previous studies to screen patients with suspected CS, both showing a high sensitivity (95-100%) and specificity (80-95%) (17, 18), in agreement with our findings.”
    Quote in the paperSubstantial claim0 of 2 sources checked
    • cites [17] Backlund, 2020, Reference intervals of salivary cortisol and cortisone and their diagnostic accuracy in cushing's syndrome, Eur J Endocrinol source

      Not checked in the free run.

    • cites [18] Ueland, 2017, Simultaneous assay of cortisol and dexamethasone improved diagnostic accuracy of the dexamethasone suppression test, Eur J Endocrinol source

      Not checked in the free run.

  • May combine two claims.

    Premisecitation

    In that meta-analysis, sensitivity was high for all tests, lowest for UFC (94%) and highest for DST (99%).

    “The sensitivity was high for all tests, lowest for UFC (94%) and highest for DST (99%).”
    Quote in the paperSubstantial claim0 of 1 sources checked
    • cites [24] Galm, 2020, Accuracy of laboratory tests for the diagnosis of cushing syndrome, J Clin Endocrinol Metab source

      Not checked in the free run.

33 of 33
  • The paper relies on this without support.

    The real-life clinical assessment made by the treating endocrinologist correctly classifies patients with adrenal incidentaloma as having ACS or non-functioning adrenal incidentaloma.

    “Currently, there is no consensus regarding diagnostic criteria for ACS (6). Therefore, in this study, no predefined diagnostic criteria were used. Instead, the diagnosis was provided through a real-life clinical assessment made by the treating endocrinologist.”
  • The paper relies on this without support.

    The clinical diagnosis of ACS/CS made by treating clinicians is a valid reference standard for evaluating the diagnostic accuracy of salivary cortisol and cortisone.

    “Instead, the diagnosis was based on clinical findings and results from the different cortisol measurement, i.e., a real-life assessment made by several physicians responsible for each patient.”
  • The paper relies on this without support.

    LC-MS/MS is more accurate than other analytical methods used to analyze steroids.

    “Another strength is that the salivary samples were analyzed using LC-MS/MS, which is more accurate than other analytical methods used to analyze steroids.”
3 of 3

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?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • LNSC-positive counts differ between analyses

    Major

    Table 1 reports 15 patients with elevated LNSC across the two adrenal-incidentaloma groups (11 plus 4). The later division of the same 155 patients by post-DST cortisol reports only 13 (11 plus 2).

  • Women's percentage does not match the stated count

    Minor

    The stated 45 women among 54 patients is 83%, not 87%.

    Reported 87 · recomputed 83.333333

  • Table 4 defines an adrenal-adenoma diagnosis as pituitary

    Minor

    The text says two CS patients had cortisol-producing adrenal adenomas, but the note defining their Table 4 diagnosis label, CPAA, calls it a pituitary adenoma.

  • Women's total differs between the text and Table 3

    Minor

    Table 3 lists 40 women without CS and 6 with CS, totaling 46 rather than the 45 stated in the text.

    Reported 45 · recomputed 46

  • The cited LNSC threshold reverses direction

    Minor

    The discussion describes the cited test as salivary cortisol below 2.8 nmol/L, whereas Table 5 describes it as LNSC above 2.8 nmol/L.

5 of 5

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Authors
Berndt, V., Dahlqvist, P., de Verdier, J., Ryberg, H., & Ragnarsson, O.
Affiliations
  • Sahlgrenska University Hospital (SE)
  • Umeå University (SE)
Venue
Frontiers in Endocrinology
Published
2022-11-23
Volume
13
Pages
1028804-1028804
ISSN
1664-2392 (ISSN-L)
OpenAlex
W4309707432
Cited by
15
References
25
Citations by year
2026: 6 · 2025: 6 · 2024: 1 · 2023: 2
FWCI
1.67
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Endocrinology (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DiVA at Umeå University (Umeå University) (submittedVersion, other-oa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
Sahlgrenska Universitetssjukhuset
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Health Sciences › Medicine › Surgery › Adrenal and Paraganglionic Tumors
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Pituitary Gland Disorders and Treatments
Keywords
salivary cortisol, salivary cortisone, hypercortisolism, Cushing's syndrome, adrenal incidentaloma, autonomous cortisol secretion, dexamethasone suppression test, diagnostic accuracy
MeSH terms
Adrenal Gland Neoplasms, Cortisone, Cushing Syndrome, Humans, Hydrocortisone, Retrospective Studies

About these checks

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.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

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