Human Body Shape Index Based on an Experimentally Derived Model of Human Growth - 07/03/14
, Katharine E. Alter, MD, Steven J. Stanhope, PhD
Reprint requests: Maria K. Lebiedowska, PhD, Rehabilitation Medicine Department, Bldg 10 CRC, Rm 1-1469, 10 Center Drive, MSC 1604, Bethesda, MD 20892-1604.Résumé |
Objectives |
To test the assumption of geometrically similar growth by developing experimentally derived models of human body growth during the age interval of 5 to 18 years; to use these derived growth models to establish a new human body shape index (HBSI) based on natural age-related changes in human body shape (HBS); and to compare various metrics of relative body weight (body mass index [BMI], ponderal index [PI], and HBSI) in a sample of 5- to 18-year-old children.
Study design |
Nondisabled Polish children (n = 847) participated in this descriptive study. To model growth, the best fit between body height (H) and body mass (M) was calculated for each sex using the allometric equation M = miHχ. HBSI was calculated separately for girls and boys, using sex-specific values for χ and a general HBSI from combined data. The customary BMI and PI were calculated and compared with HBSI values.
Results |
The models of growth were M = 13.11H2.84 (R2 = 0.90) for girls and M = 13.64H2.68 (R2 = 0.91) for boys. HBSI values contained less inherent variability and were less influenced by growth (age and height) compared with BMI and PI.
Conclusions |
Age-related growth during childhood is sex-specific and not geometrically similar. Therefore, indices of HBS formulated from experimentally derived models of human growth are superior to customary geometric similarity-based indices for characterizing HBS in children during the formative growth years.
Le texte complet de cet article est disponible en PDF.Abbreviations : BMI, CV, HBS, HBSI, PI, SD
Plan
Vol 152 - N° 1
P. 45 - janvier 2008 Retour au numéro
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