1. Normative Data for Insulin-Like Growth Factor 1 in Healthy Children and Adolescents From India.
- Author
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Ravi Teja KV, Malhotra B, Vogel M, Marwaha RK, Aggarwal A, Pal R, Das L, Sachdeva N, Devi N, Bansal D, Rastogi A, Sharma S, Gajinder D, Bhadada SK, Ghosh J, Monaghan PJ, Korbonits M, and Dutta P
- Subjects
- Humans, Adolescent, Male, Female, Child, India, Cross-Sectional Studies, Reference Values, Healthy Volunteers, Age Determination by Skeleton, Biomarkers blood, Insulin-Like Peptides, Insulin-Like Growth Factor I analysis, Insulin-Like Growth Factor I metabolism
- Abstract
Background: Serum insulin-like growth factor 1 (IGF-1) is an important biochemical tool to diagnose and monitor growth hormone (GH)-related disorders. However, ethnicity-specific Indian data, following consensus criteria for the establishment of normative data, are not available. Our objective was to generate chronological age (CA)-, bone age (BA)- and Tanner stage-specific normative data for IGF-1 in healthy Indian children and adolescents., Methods: A cross-sectional epidemiological study was conducted in schools and the community, which enrolled apparently healthy children and adolescents with robust exclusion criteria. The outcome measure was serum IGF-1 assessed using an electro-chemiluminescence immunoassay (ECLIA). The 2.5th, 5th, 10th, 25th, 50th (median), 75th, 90th, 95th, and 97.5th centiles for IGF-1 were estimated using generalized additive models., Results: We recruited 2226 apparently healthy participants and following exclusion, 1948 (1006 boys, 942 girls) were included in the final analysis. Girls had median IGF-1 peak at CA of 13 years (321.7 ng/mL), BA of 14 years (350.2 ng/mL) and Tanner stage IV (345 ng/mL), while boys had median IGF-1 peak at CA of 15 years (318.9 ng/mL) BA of 15 years (340.6 ng/mL) and Tanner stage III (304.8 ng/mL). Girls had earlier rise, earlier peak, and higher IGF-1 values. The reference interval (2.5th to 97.5th percentile) was broader during peripubertal ages, indicating a higher physiological variability., Conclusion: This study provides ethnicity-specific normative data on serum IGF-1 and will improve the diagnostic utility of IGF-1 in the evaluation and management of growth disorders in Indian children and adolescents., (© The Author(s) 2024. Published by Oxford University Press on behalf of the Endocrine Society. All rights reserved. For commercial re-use, please contact reprints@oup.com for reprints and translation rights for reprints. All other permissions can be obtained through our RightsLink service via the Permissions link on the article page on our site—for further information please contact journals.permissions@oup.com. See the journal About page for additional terms.)
- Published
- 2024
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