Height Velocity Defined Metabolic Control in Children With Congenital Adrenal Hyperplasia Using Urinary Steroid GC-MS Analysis

Author:

Kamrath Clemens1ORCID,Wettstaedt Lisa1,Hartmann Michaela F1,Wudy Stefan A1

Affiliation:

1. Division of Pediatric Endocrinology and Diabetology, Laboratory for Translational Hormone Analysis in Pediatric Endocrinology, Steroid Research & Mass Spectrometry Unit, Center of Child and Adolescent Medicine, Justus Liebig University, Giessen, Germany

Abstract

Abstract Background Treatment of children with classic congenital adrenal hyperplasia (CAH) with glucocorticoids is a difficult balance between hypercortisolism and hyperandrogenism. Biochemical monitoring of treatment is not well defined. Achievement of a normal growth rate is the most important therapeutic goal. Methods We retrospectively evaluated 123 24-hour gas chromatography–mass spectrometry urinary steroid metabolome analyses together with their corresponding 1-year height velocity (HV) z scores in 63 prepubertal children aged 7.2 ± 1.6 years with classic CAH due to 21-hydroxylase deficiency treated with hydrocortisone and fludrocortisone. Results Multivariate linear mixed effects model analysis revealed a positive influence of CAH-specific z scores of summed urinary androgen metabolites (B = 0.97 ± 0.20, t = 4.87, P < 0.0001) and a negative influence of the cortisol metabolite tetrahydrocortisol (B = −1.75 ± 0.79, t = −2.20, P = 0.03) on HV z scores. Receiver operating characteristic analysis demonstrated that adrenal androgen excess, defined as HV >1.5 z, was best determined by a z score of all urinary androgen metabolites of >0.512 [accuracy, 66.2%; sensitivity, 57.1%; specificity, 74.4%; positive prediction value (PPV), 66.7%; negative prediction value (NPV), 65.9%]. Tetrahydrocortisol excretion >1480 µg/m2 BSA/d in conjunction with suppressed urinary androgen metabolites <0.163 z indicated overtreatment, defined as HV < −1.5 z (accuracy, 79.6%; sensitivity, 40.0%; specificity, 94.9%; PPV, 75.0%; NPV, 80.4%). Conclusion We established target values for urinary steroid metabolite excretions in children with CAH based on their growth rate. Urinary steroid metabolome analysis represents a highly suitable method for monitoring metabolic control in children with CAH.

Publisher

The Endocrine Society

Subject

Biochemistry (medical),Clinical Biochemistry,Endocrinology,Biochemistry,Endocrinology, Diabetes and Metabolism

Reference34 articles.

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3. Height outcome in congenital adrenal hyperplasia caused by 21-hydroxylase deficiency: a meta-analysis;Eugster;J Pediatr,2001

4. Growth patterns and final height in congenital adrenal hyperplasia due to classical 21-hydroxylase deficiency: results of a multicenter study;Hargitai;Horm Res,2001

5. Growth of patients with 21-hydroxylase deficiency: an analysis of the factors influencing adult height;Jääskeläinen;Pediatr Res,1997

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