1. Urinary free cortisol excretion during growth and aging: Correlation with cortisol production rate and 17-hydroxycorticosteroid excretion
- Author
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Roger E. Juselius and Frederic M. Kenny
- Subjects
Adult ,Male ,Aging ,medicine.medical_specialty ,Adolescent ,Hydrocortisone ,Body Surface Area ,Endocrinology, Diabetes and Metabolism ,Statistics as Topic ,Growth ,Body weight ,Correlation ,Excretion ,chemistry.chemical_compound ,Endocrinology ,Internal medicine ,Adrenal Glands ,Urinary free cortisol ,medicine ,Humans ,Child ,17-Hydroxycorticosteroids ,Body surface area ,Creatinine ,Chemistry ,Muscles ,Body Weight ,Age Factors ,Infant ,Middle Aged ,Child, Preschool ,Body Composition ,Female ,medicine.drug ,Production rate - Abstract
Urinary free cortisol (UFC) values in normal subjects have been determined for various age groups ranging from 4 mo to 50 yr. Mean values for UFC24 hr increased with age until approximately 20 yr, after which a relatively stable level of excretion was maintained. Correction of UFC for body surface area (per sq m), body weight (per kg), or muscle mass, i.e., creatinine excretion (per g creatinine), did not resolve the differences in all of the age groups studied. Regardless of the correction parameter used (surface area, etc.), a minimum in cortisol excretion was found in the 11–20-yr age group. Guidelines for the interpretation of cortisol production rate (CPR) and 17-hydroxycorticosteroid (17-OHCS) excretion in the same age groups are also provided. There was a significant positive correlation between UFC and both CPR (r = 0.71) and 17-OHCS (r = 0.87) during growth and maturation. Taking into account the variation in excretion of UFC with age, the data provides reference standards for the use of UFC in the diagnosis of adrenocortical disorders in children and adults.
- Published
- 1974
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