ArticleEndocrine2025
Clinical utility of salivary cortisol for diagnosis and therapeutic monitoring in adrenal insufficiency.
Article in Endocrine, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
purposeTo evaluate the diagnostic utility of salivary cortisol (CS) as a non-invasive screening and monitoring tool for adrenal insufficiency (AI), and to assess its capacity to reflect cortisol exposure in patients receiving hydrocortisone (HC) replacement therapy.
methodsThis prospective study included adult patients with clinical suspicion of primary or secondary AI who underwent ACTH stimulation testing (ACTH-t) and provided ambulatory CS samples at five time points (08:00, 13:00, 18:00, 24:00, and 08:00 the following day). CS was quantified via electrochemiluminescence immunoassay. Diagnostic performance, optimal thresholds, and correlations with morning serum cortisol (CB) and HC dosing were analyzed.
resultsOut of 60 patients included, 11 (18.3%) were diagnosed with AI. CS8 had a higher AUC than CB (0.804 vs. 0.739), -non-significant difference between AUC-. A CS8 threshold < 0.0975 µg/dL yielded 100% sensitivity and 75% positive predictive value, while > 0.708 µg/dL achieved 100% negative predictive value. Afternoon and evening CS levels were significantly higher in HC-treated patients, with elevated diurnal 08:00–24:00 cortisol exposure (AUC 7.82[2.57–11.14] vs. 2.73[2.19–3.79] ng·h/mL;p = 0.017) and a trend toward lower morning CS, suggesting overtreatment during the day and under-replacement at night 24:00–8:00 (AUC 2.06[0.67–6.13] vs. 1.6 [1.33–2.43] ng·h/mL;ns).
conclusionsCS is a reliable, non-invasive biomarker for both screening and monitoring of AI. Its ability to reflect circadian cortisol dynamics offers clinical value in assessing replacement adequacy. Salivary profiling may guide individualized HC dose titration and help avoid overtreatment. Larger studies including salivary cortisone are warranted to refine monitoring strategies.
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