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Reference intervals...
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Bäcklund, NilsDepartment of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
(author)
Reference intervals of salivary cortisol and cortisone and their diagnostic accuracy in Cushing’s syndrome
- Article/chapterEnglish2020
Publisher, publication year, extent ...
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Bioscientifica,2020
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printrdacarrier
Numbers
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LIBRIS-ID:oai:DiVA.org:oru-109618
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https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-109618URI
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https://doi.org/10.1530/eje-19-0872DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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Objective: The challenge of diagnosing Cushing's syndrome (CS) calls for high precision biochemical screening. This study aimed to establish robust reference intervals for, and compare the diagnostic accuracy of, salivary cortisol and cortisone in late-night samples and after a low-dose (1 mg) dexamethasone suppression test (DST).Design and methods: Saliva samples were collected at 08:00 and 23:00 h, and at 08:00 h, after a DST, from 22 patients with CS and from 155 adult reference subjects. We also collected samples at 20:00 and 22:00 h from 78 of the reference subjects. Salivary cortisol and cortisone were analysed with liquid chromatography-tandem mass spectrometry. The reference intervals were calculated as the 2.5th and 97.5th percentiles of the reference population measurements. Diagnostic accuracies of different tests were compared, based on areas under the receiver-operating characteristic curves.Results: The upper reference limits of salivary cortisol and cortisone at 23:00 h were 3.6 nmol/L and 13.5 nmol/L, respectively. Using these reference limits, CS was detected with a sensitivity (95% CI) of 90% (70-99%) and specificity of 96% (91-98%) for cortisol, and a 100% (84-100%) sensitivity and 95% (90-98%) specificity for cortisone. After DST, cortisol and cortisone upper reference limits were 0.79 nmol/L and 3.5 nmol/L, respectively. CS was detected with 95% (75-100%) sensitivity and 96% (92-99%) specificity with cortisol, and 100% (83-100%) sensitivity and 94% (89-97%) specificity with cortisone. No differences in salivary cortisol or cortisone levels were found between samples collected at 22:00 and 23:00 h.Conclusion: Salivary cortisol and cortisone in late-night samples and after DST showed high accuracy for diagnosing CS, salivary cortisone being slightly, but significantly better.
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Brattsand, GöranDepartment of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
(author)
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Israelsson, MarlenDepartment of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
(author)
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Ragnarsson, OskarDepartment of Internal Medicine and Clinical Nutrition, Institute of Medicine at Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; Department of Endocrinology, Sahlgrenska University Hospital, Gothenburg, Sweden
(author)
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Burman, PiaDepartment of Endocrinology, Skåne University Hospital, University of Lund, Malmö, Sweden
(author)
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Edén Engström, BrittDepartment of Medical Sciences, Endocrinology and Mineral Metabolism, Uppsala University, Uppsala, Sweden
(author)
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Høybye, CharlotteDepartment of Molecular Medicine and Surgery, Patient Area Endocrinology and Nephrology, Inflammation and Infection Theme, Karolinska Institute and Karolinska University Hospital, Stockholm, Sweden
(author)
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Berinder, KatarinaDepartment of Molecular Medicine and Surgery, Patient Area Endocrinology and Nephrology, Inflammation and Infection Theme, Karolinska Institute and Karolinska University Hospital, Stockholm, Sweden
(author)
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Wahlberg, Jeanette,1969-Department of Endocrinology, Department of Medical and Health Sciences, Linköping University, Linköping, Sweden(Swepub:oru)jewg
(author)
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Olsson, TommyDepartment of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
(author)
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Dahlqvist, PerDepartment of Public Health and Clinical Medicine, Umeå University, Umeå, Sweden
(author)
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Department of Public Health and Clinical Medicine, Umeå University, Umeå, SwedenDepartment of Medical Biosciences, Clinical Chemistry, Umeå University, Umeå, Sweden
(creator_code:org_t)
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In:European Journal of Endocrinology: Bioscientifica182:6, s. 569-5820804-46431479-683X
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