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1.
An Pediatr (Barc) ; 58(3): 222-7, 2003 Mar.
Article in Spanish | MEDLINE | ID: mdl-12628092

ABSTRACT

OBJECTIVE: To establish the reference ranges of thyrotropin (TSH), free triiodothyronine (FT3) and free thyroxine (FT4) with the chemiluminescence method in healthy children and adolescents in Madrid, Spain. METHOD: A total of 371 children and adolescents of both sexes, with different ages and at different pubertal stage participated in the study. Serum values of TSH, FT3, and FT4 were determined by chemiluminescence. RESULTS: TSH, FT4 and FT3 reference ranges decreased inversely with chronological age. Significant differences were found between prepubertal and pubertal groups. In some groups, there were also occasional differences between sexes. CONCLUSIONS: Thyroid hormone levels decrease with chronological age. Because of the differences in hormone levels between prepubertal and pubertal subjects, we believe that different pubertal stages should be included in the standard reference values of these hormones.


Subject(s)
Thyrotropin/blood , Thyroxine/blood , Triiodothyronine/blood , Adolescent , Child , Child, Preschool , Female , Humans , Infant , Luminescent Measurements , Male , Spain , Urban Population
2.
An. pediatr. (2003, Ed. impr.) ; 58(3): 222-227, mar. 2003.
Article in Es | IBECS | ID: ibc-19964

ABSTRACT

Objetivo. El objetivo del presente trabajo ha sido establecer los valores de referencia de las hormonas tiroideas (tirotropina [TSH], triyodotironina [T3] libre y tiroxina [T4] libre) mediante quimioluminiscencia en niños y adolescentes de la Comunidad Autónoma de Madrid. Método. 371 niños y adolescentes de ambos sexos, diferentes edades y estadios puberales, participaron en este estudio. Los valores de TSH y T3 y T4 libres en suero se determinaron mediante quimioluminiscencia. Resultados. Los valores de TSH y T4 y T3 libres descienden de forma inversamente proporcional a la edad cronológica con diferencias significativas entre los grupos prepuberales y puberales. Existen, además, diferencias puntuales entre sexos en algunos grupos. Conclusiones. Los valores de las hormonas tiroideas disminuyen con la edad cronológica. A la vista de las diferencias en los valores de estas hormonas entre sujetos prepuberales y puberales consideramos necesario incluir los diferentes estadios puberales en la estandarización de estas hormonas (AU)


Subject(s)
Child , Child, Preschool , Adolescent , Male , Infant , Female , Humans , Spain , Triiodothyronine , Thyrotropin , Thyroxine , Urban Population , Luminescence , Luminescent Measurements
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