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Archivos argentinos de pediatría

Print version ISSN 0325-0075On-line version ISSN 1668-3501


BALLERINI, María G et al. Insulin level and insulin sensitivity indices among healthy children and adolescents. Arch. argent. pediatr. [online]. 2016, vol.114, n.4, pp.329-336. ISSN 0325-0075.

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. Population 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 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 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.

Keywords : Pediatrics; Insulin; Reference ranges; Insulin resistance.

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