Artículo
Diagnostic Accuracy of Morning Salivary Cortisol in the Assessment of the Hypothalamic-Pituitary-Adrenal Axis Recovery after Prolonged Corticosteroid Therapy in Children
Ballerini, Maria Gabriela; Freire, Analía Verónica; Rodríguez, María Eugenia; Suco Valle, Sofia Magdalena; Castro, Sebastián; Arcari, Andrea Josefina; Bergadá, Ignacio
; Ropelato, Maria Gabriela
Fecha de publicación:
05/2023
Editorial:
Karger
Revista:
Hormone Research in Paediatrics
ISSN:
1663-2818
e-ISSN:
1663-2826
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Introduction: Assessment of the hypothalamic-pituitary-adrenal (HPA) axis is necessary after prolonged glucocorticoid therapy withdrawal. Salivary cortisol reflects 65% of the free circulating cortisol fraction. Saliva collection is noninvasive and child friendly. Objective: We aimed to evaluate the diagnostic accuracy of morning salivary cortisol (mSAF) to determine HPA recovery after prolonged corticosteroid therapy in children. Methods: We conducted a prospective, validation study in 171 paediatric patients (mean ± SD age: 13.0 ± 4.4 years) who received glucocorticoids for >4 weeks (median and interquartile range: 11 [7–14] months) and were referred for therapy withdrawal. Serum and saliva samples were collected between 8 and 9 a.m. on the same day. Cortisol was measured by an electrochemiluminescence immunoassay (ECLIA) 48 h after cessation of glucocorticoid therapy. Serum cortisol ≥193 nmol/L was used as the reference cut-off value for HPA recovery after glucocorticoid withdrawal and mSAF as the index test. Results: The cut-off concentration obtained by ROC for mSAF was ≥5.0 nmol/L. True positive and true negative results were observed in 85/171 and 40/171 children, respectively. The false-positive rate was low (3/171, 1.7%); however, false-negative results were observed in 43/171 (25%) children. The main ROC results (95% CI) were area under curve: 0.98 (0.96–0.99), sensitivity: 0.66 (0.57–0.75), specificity: 0.93 (0.81–0.99), positive predictive value: 0.97 (0.90–0.99), negative predictive value: 0.48 (0.37–0.59), LR+: 9.5, and diagnostic accuracy: 73.1%. Conclusion: The present study supports that mSAF ≥5.0 nmol/L by ECLIA is a non-invasive biomarker for the assessment of HPA recovery after prolonged glucocorticoid therapy in paediatric patients, with a positive predictive value of 97%. This proposed cut-off should be further validated using gold standard techniques for steroid quantification such as liquid chromatography-tandem mass spectrometry.
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Articulos(CEDIE)
Articulos de CENTRO DE INVESTIGACIONES ENDOCRINOLOGICAS "DR. CESAR BERGADA"
Articulos de CENTRO DE INVESTIGACIONES ENDOCRINOLOGICAS "DR. CESAR BERGADA"
Citación
Ballerini, Maria Gabriela; Freire, Analía Verónica; Rodríguez, María Eugenia; Suco Valle, Sofia Magdalena; Castro, Sebastián; et al.; Diagnostic Accuracy of Morning Salivary Cortisol in the Assessment of the Hypothalamic-Pituitary-Adrenal Axis Recovery after Prolonged Corticosteroid Therapy in Children; Karger; Hormone Research in Paediatrics; 97; 1; 5-2023; 53-61
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