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The effect of economic status on height, insulin-like growth factor (IGF)-I and IGF binding protein-3 concentrations in healthy Turkish children

European Journal of Clinical Nutrition volume 61, pages 752–758 (2007)Cite this article

Abstract

Objectives:

The effect of economic status (ES) on growth, insulin-like growth factor (IGF)-I and IGF-binding protein (IGFBP)-3 in healthy children is not well characterized. We aimed to study the interrelationship between height, weight, IGF-I, IGFBP-3, mid-parental height (MPH) and ES.

Design/subjects:

Eight hundred and fourteen healthy children (428 boys, 386 girls; age 3–18 years) were classified according to income of the families as low, middle and high. Standard deviation scores (SDSs) of height, weight, MPH, IGF-I and IGFBP-3 were compared between the groups. The combined effect of these parameters and ES on height SDS was investigated with complex statistical models.

Results:

There was a significant trend for height and weight SDSs to increase with higher income levels in boys, but not in girls. Body mass index (BMI) SDSs were similar in three groups. There was a general trend for MPH SDS to increase with income levels in both sexes. In boys, IGF-I SDS was significantly higher in high ES group than low ES. In girls, IGFBP-3 SDSs were significantly higher in high ES group than in middle ES group. For both genders, height SDS was highly correlated with weight SDS and moderately correlated with BMI SDS, MPH SDS and IGF-1 SDS. All correlations were significant and positive. Complex models showed that MPH (19%), IGF-I (13%) and ES (3%) in boys, and MPH (16%) and IGF-I (7%) in girls have significant contribution to height SDSs.

Conclusions:

ES per se, independent of overt malnutrition, affects height, weight, IGF-I and IGFBP-3 with some gender differences in healthy children. Influence of income on height and weight show sexual dimorphism, a slight but significant effect is observed only in boys. MPH is the most prominent variable effecting height in healthy children. Higher height and MPH SDSs observed in higher income groups suggest that secular trend in growth still exists, at least in boys, in a country of favorable economic development.

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Acknowledgements

This work has been supported by the Turkish Academy of Sciences, in the framework of the Young Scientist Award program. (EA/TUBA-GEBIP/2001-1-1).

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Authors and Affiliations

  1. Department of Paediatric Endocrinology, Marmara University, School of Medicine, Istanbul, Turkey

    S Turan, A Bereket, A Omar, M Berber, A Ozen & C Akbenlioglu

  2. Institute of Environmental Sciences, Bogazici University, Istanbul, Turkey

    A Furman

  3. Department of Biochemistry, Marmara University, School of Medicine, Istanbul, Turkey

    G Haklar

Authors
  1. S Turan
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  2. A Bereket
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  3. A Furman
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  4. A Omar
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  5. M Berber
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  6. A Ozen
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  7. C Akbenlioglu
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Correspondence to S Turan.

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Guarantors: S Turan and A Bereket.

Contributors: The project was designed and coordinated by Professor AB with assistance of ST. ST and Assoc. Professor AF analyzed the data, and wrote the manuscript. AO, MB, AO, CA have responsibility in sample and data collection. GH analyzed the samples.

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Turan, S., Bereket, A., Furman, A. et al. The effect of economic status on height, insulin-like growth factor (IGF)-I and IGF binding protein-3 concentrations in healthy Turkish children. Eur J Clin Nutr 61, 752–758 (2007). https://doi.org/10.1038/sj.ejcn.1602575

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