Abstract:
INTRODUCTION:Information on insulin reference values and insulin sensitivity indices in the field of pediatrics is scarce. OBJECTIVE:To describe insulin range and insulin sensitivity surrogate indices during childhood. MATERIALS AND METHODS:Fasting insulin level range and surrogate indices, such as the homeostasis model assessment of insulin resistance (HOMA-IR), among healthy children and adolescents by age, body mass index, pubertal stage (PS), insulin-like growth factor-1 (IGF-1), total cholesterol, and triglycerides. RESULTS:Two hundred and twenty-six healthy children and adolescents (1-18 years old) were included. Insulin increased with age, body mass index, pubertal stage, IGF-1 and triglyceride levels (r2= 0.38, p 〈 0.0001). Prepubertal children 〉 7.5 years old had higher insulin levels [median (P3 and P97) pIU/mL: 5.0 (1.7-9.6)] than prepubertal children 〈 7.5 years old [2.9 pIU/ mL (1.3-10.9), p 〈 0.01]. During puberty (from PS II to PS V), insulin was higher in girls than in boys [7.4 (1.8-16.9) versus 5.8 (1.8-12.9), p 〈 0.01]. The HOMA-IR index increased in the group of prepubertal children 〉 7.5 years old: 1.1 (0.32.0) versus children 〈 7.5 years old: 0.6 (0.3-1.4, p 〈 0.01). The insulin level and HOMA-IR results were higher in pubertal children compared to the prepubertal group (p 〈 0.001). CONCLUSIONS:Known physiological changes were observed inboth insulin levels and the HOMA-IR index among children and adolescents. A fasting blood insulin level of 10 pIU/mL in prepubertal children and of 17 pIU/mL and 13 pIU/mL in pubertal girls and boys, respectively, may be considered as an acceptable cut-off value in healthy children. A HOMA-IR value 〉 2.0 and 〉 2.6 in prepubertal and pubertal children, respectively, may be considered a warning sign for pediatricians to further investigate insulin resistance. INTRODUCCIÓN:Existe escasa información acerca de los valores de referencia de la insulina y de los índices de insulinosensibilidad en pediatría. OBJETIVO:Describir la variación de insulina e índices subrogantes de insulinosensibilidad en la etapa pediátrica. MATERIALES Y MÉTODOS:Variación de la concentración de insulina en ayuno y de los índices subrogantes, como el modelo de evaluación homeostática de resistencia a la insulina (homeostasis model assessment of insulin resistance; HOMA-IR, por sus siglas en inglés), en niños sanos con la edad, el índice de masa corporal, estadio puberal (EP), la concentración de IGF-I, colesterol total y triglicéridos. RESULTADOS:Se incluyeron 226 niños sanos (1-18 años). La insulina aumentó con la edad, el índice de masa corporal, el EP, los niveles de IGF-I y triglicéridos (r2= 0,38; p 〈 0,0001). Los niños prepuberales 〉 7,5 años presentaron mayores valores de insulina [mediana (Pc3 y Pc97) pUI/ mL: 5,0 (1,7-9,6)] que los prepuberales 〈 7,5 años [2,9 pUI/mL (1,3-10,9); p 〈 0,01]. En la pubertad (del EP II al EP V), la insulina fue mayor en las niñas que en los varones [(7,4 (1,8-16,9) versus 5,8 (1,8-12,9); p 〈 0,01]. El índice HOMA-IR aumentó en el grupo prepuberal 〉 7,5 años: 1,1 (0,3-2,0) versus niños 〈 7,5 años: 0,6 (0,3-1,4; p 〈 0,01). Los grupos puberales presentaron niveles más elevados de insulina y de HOMA-IR respecto de los niños prepuberales (p 〈 0,001). CONCLUSIONES:La insulina y el índice HOMA-IR mostraron los cambios fisiológicos conocidos en niños y adolescentes. Valores de insulinemia en ayuno de 10 pUI/mL en prepúberes y 17 pUI/ mL y 13 pUI/mL en niñas y niños púberes respectivamente pueden ser considerados como valor límite aceptable en niños sanos. HOMA-IR 〉 2,0 y 〉 2,6 en prepúberes y púberes, respectivamente, podrían alertar a los pediatras sobre un posible estado de insulinorresistencia.
journal_name
Arch Argent Pediatrjournal_title
Archivos argentinos de pediatriaauthors
Ballerini MG,Bergadá I,Rodríguez ME,Keselman A,Bengolea VS,Pipman V,Domené HM,Jasper HG,Ropelato MGdoi
10.5546/aap.2016.eng.329subject
Has Abstractpub_date
2016-08-01 00:00:00pages
329-36issue
4eissn
0325-0075issn
1668-3501journal_volume
114pub_type
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