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Reference values of bone stiffness index and C-terminal telopeptide in healthy European children

(2014) INTERNATIONAL JOURNAL OF OBESITY. 38(suppl. 2). p.S76-S85
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Abstract
BACKGROUND/OBJECTIVE: Quantitative ultrasound measurements and bone metabolic markers can help to monitor bone health and to detect impaired skeletal development. Population-based reference values for children may serve as a basis for preventive measures to reduce the risk of osteoporosis and osteoporotic fractures in later life. This is the first paper providing age-, sex-and height-specific reference values for bone stiffness index (SI) and serum carboxy-terminal cross-linking telopeptide of type I collagen (CTX) in healthy, apparently prepubertal children. SUBJECTS/METHODS: In the population-based IDEFICS baseline survey (2007-2008) and follow-up (2009-2010), 18 745 children from eight European countries were newly recruited. A total of 10 791 2-10.9-year-old and 1646 3-8.9-year-old healthy children provided data on SI of the right and left calcaneus and serum CTX, respectively. Furthermore, height and weight were measured. Percentile curves were calculated using the General Additive Model for Location Scale and Shape (GAMLSS) to model the distribution of SI and CTX depending on multiple covariates while accounting for dispersion, skewness, and the kurtosis of this distribution. RESULTS: SI was negatively associated with age and height in children aged 2-5 years, whereas a positive association was observed in children aged 6-10 years. The dip in SI occurred at older age for higher SI percentiles and was observed earlier in taller children than in smaller children. The CTX reference curves showed a linear-positive association with age and height. No major sex differences were observed for the SI and CTX reference values. CONCLUSION: These reference data lay the ground to evaluate bone growth and metabolism in prepubertal children in epidemiological and clinical settings. They may also inform clinical practice to monitor skeletal development and to assess adverse drug reactions during medical treatments.
Keywords
BODY-MASS INDEX, PEDIATRIC REFERENCE INTERVALS, QUANTITATIVE ULTRASOUND, MINERAL DENSITY, CALCANEAL ULTRASOUND, TURNOVER MARKERS, REFERENCE CURVES, OBESE CHILDREN, ADOLESCENTS, AGE

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Chicago
Herrmann, D, T Intemann, F Lauria, S Mårild, D Molnár, LA Moreno, Isabelle Sioen, et al. 2014. “Reference Values of Bone Stiffness Index and C-terminal Telopeptide in Healthy European Children.” International Journal of Obesity 38 (suppl. 2): S76–S85.
APA
Herrmann, D, Intemann, T., Lauria, F., Mårild, S., Molnár, D., Moreno, L., Sioen, I., et al. (2014). Reference values of bone stiffness index and C-terminal telopeptide in healthy European children. INTERNATIONAL JOURNAL OF OBESITY, 38(suppl. 2), S76–S85.
Vancouver
1.
Herrmann D, Intemann T, Lauria F, Mårild S, Molnár D, Moreno L, et al. Reference values of bone stiffness index and C-terminal telopeptide in healthy European children. INTERNATIONAL JOURNAL OF OBESITY. 2014;38(suppl. 2):S76–S85.
MLA
Herrmann, D et al. “Reference Values of Bone Stiffness Index and C-terminal Telopeptide in Healthy European Children.” INTERNATIONAL JOURNAL OF OBESITY 38.suppl. 2 (2014): S76–S85. Print.
@article{7006921,
  abstract     = {BACKGROUND/OBJECTIVE: Quantitative ultrasound measurements and bone metabolic markers can help to monitor bone health and to detect impaired skeletal development. Population-based reference values for children may serve as a basis for preventive measures to reduce the risk of osteoporosis and osteoporotic fractures in later life. This is the first paper providing age-, sex-and height-specific reference values for bone stiffness index (SI) and serum carboxy-terminal cross-linking telopeptide of type I collagen (CTX) in healthy, apparently prepubertal children. 
SUBJECTS/METHODS: In the population-based IDEFICS baseline survey (2007-2008) and follow-up (2009-2010), 18 745 children from eight European countries were newly recruited. A total of 10 791 2-10.9-year-old and 1646 3-8.9-year-old healthy children provided data on SI of the right and left calcaneus and serum CTX, respectively. Furthermore, height and weight were measured. Percentile curves were calculated using the General Additive Model for Location Scale and Shape (GAMLSS) to model the distribution of SI and CTX depending on multiple covariates while accounting for dispersion, skewness, and the kurtosis of this distribution. 
RESULTS: SI was negatively associated with age and height in children aged 2-5 years, whereas a positive association was observed in children aged 6-10 years. The dip in SI occurred at older age for higher SI percentiles and was observed earlier in taller children than in smaller children. The CTX reference curves showed a linear-positive association with age and height. No major sex differences were observed for the SI and CTX reference values. 
CONCLUSION: These reference data lay the ground to evaluate bone growth and metabolism in prepubertal children in epidemiological and clinical settings. They may also inform clinical practice to monitor skeletal development and to assess adverse drug reactions during medical treatments.},
  author       = {Herrmann, D and Intemann, T and Lauria, F and Mårild, S and Molnár, D and Moreno, LA and Sioen, Isabelle and Tornaritis, M and Veidebaum, T and Pigeot, I and Ahrens, W},
  issn         = {0307-0565},
  journal      = {INTERNATIONAL JOURNAL OF OBESITY},
  keywords     = {BODY-MASS INDEX,PEDIATRIC REFERENCE INTERVALS,QUANTITATIVE ULTRASOUND,MINERAL DENSITY,CALCANEAL ULTRASOUND,TURNOVER MARKERS,REFERENCE CURVES,OBESE CHILDREN,ADOLESCENTS,AGE},
  language     = {eng},
  number       = {suppl. 2},
  pages        = {S76--S85},
  title        = {Reference values of bone stiffness index and C-terminal telopeptide in healthy European children},
  url          = {http://dx.doi.org/10.1038/ijo.2014.138},
  volume       = {38},
  year         = {2014},
}

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