title: [Pediatric reference intervals : retrospective study on thyroid hormone levels].
abstract: Defining reference range is an essential tool for diagnostic. Age and sexe influences on thyroid hormone levels have been already discussed. In this study, we are defining a new pediatric reference range for TSH, FT3 and FT4 for Cobas C6000 analyzer. To do so, we have taken in account 0 to 18 year old outclinic patients. During the first year of life, thyroid hormone levels change dramatically before getting stabilized around 3 years old. We also compared our results to those obtained in a Canadian large-scale prospective study (the CALIPER initiative).
authors.affiliation: Département de Chimie clinique, Biologie clinique, CHU de Liège, Site Sart Tilman, Liège, Belgique.
authors.forename: A
authors.initials: A
authors.lastname: Ladang
authors.affiliation: Département de Chimie clinique, Biologie clinique, CHU de Liège, Site Sart Tilman, Liège, Belgique.
authors.forename: L
authors.initials: L
authors.lastname: Vranken
authors.affiliation: Hôpital du Bois de l'Abbaye, Seraing, Belgique.
authors.forename: F
authors.initials: F
authors.lastname: Luyckx
authors.affiliation: Service de Pédiatrie, Endocrinologie et Diabétologie, CHU de Liège, Site Notre-Dame des Bruyères, Liège, Belgique.
authors.forename: M-C
authors.initials: MC
authors.lastname: Lebrethon
authors.affiliation: Département de Chimie clinique, Biologie clinique, CHU de Liège, Site Sart Tilman, Liège, Belgique.
authors.forename: E
authors.initials: E
authors.lastname: Cavalier
mesh_terms: D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D012016:Reference Values; D012189:Retrospective Studies; D013963:Thyroid Hormones / Q000097:blood*
chemical_list: D013963:Thyroid Hormones
keywords:  Pediatric ;  Thyroid hormone level; Reference range 