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- Title
Early morning salivary cortisol and cortisone, and adrenal responses to a simplified low-dose short Synacthen test in children with asthma.
- Authors
Blair, Joanne; Lancaster, Gillian; Titman, Andrew; Peak, Matthew; Newlands, Paul; Collingwood, Catherine; Chesters, Christine; Moorcroft, Teresa; Wallin, Naomi; Hawcutt, Daniel; Gardner, Christopher; Didi, Mohammed; Lacy, David; Couriel, Jonathan
- Abstract
Objective To examine serum cortisol responses to a simplified low-dose short Synacthen test ( LDSST) in children treated with inhaled corticosteroids ( ICS) for asthma and to compare these to early morning salivary cortisol ( EMSC) and cortisone ( EMSCn) levels. Design Early morning salivary cortisol and EMSCn samples were collected for three consecutive days. On day three, Synacthen 500 ng/1·73 m2 was administered intravenously. Samples were collected at 0, 15, 25, 35 min. Results A total of 269 subjects (160 M: 109 F), median (range) age 10·0 (5·1-15·2) years were studied. Peak cortisol in the LDSST was <500 nmol/l in 101 subjects (37·5%) and <350 nmol/l in 12 subjects (4·5%). Basal cortisol correlated with peak cortisol: r = 0·55, (95% CI: 0·46, 0·63, P < 0·0001). Time at which peak cortisol concentration was achieved was significantly related to the value of peak cortisol ( P < 0·0001), with higher cortisol peaks occurring later in the test and lower cortisol peaks occurring earlier. EMSC and EMSCn had no predictive value for the identification of patients with a peak cortisol <500 nmol/l. EMSCn was superior to EMSC in identifying patients with a peak cortisol <350 nmol/l: a minimum EMSCn cut-off value of 12·5 nmol/l gave a negative predictive value of 99·2% and positive predictive value of 30·1%. Conclusion Our data illustrate that basal measures of cortisol are likely to be of value in screening populations for patients at greatest risk of adrenal crisis. EMSCn shows promise as a screening tool for the identification of patients with severe adrenal insufficiency.
- Subjects
ADRENOCORTICAL hormones; CORTISONE; ASTHMA in children; ALLERGY in children; RESPIRATORY allergy; ADRENAL insufficiency
- Publication
Clinical Endocrinology, 2014, Vol 80, Issue 3, p376
- ISSN
0300-0664
- Publication type
Article
- DOI
10.1111/cen.12302