The Use of Geometrical Model in Estimating the Segmental Trunk Volume by Anthropometric Measurements

For 28 females, geometrical model of upper trunk was generated from three dimensional measurements. Twelve anthropometric measurements and criterion upper trunk volume were calculated from the model. The optimal and a practical sets of measurements to estimate the criterion volume were selected based on a selective stepwise regression analysis and all-possible-subset regression analysis. The estimation equation based on six variables had minimum Cp statistic with R=0.987 and SEE=345cm3; the equation of volume (Y)=521.09 (chest depth)+83.09 (weight) +236.44 (height of acromion)+236.17 (biacromial diameter)+147.32 (chest breadth)-267.69 (neck girth)-13594.1 (cm3). For a simpler and more practical prediction, an equation of Y=521.66(chest depth)+94.17 (weight)+240.69 (height of acromion)-9786.8 (cm3) was obtained with R=0.972 and SEE=465cm3, showing that the volume could be practically predicted by chest depth as a typical trunk depth, height of acromion measured from the waist level as total upper trunk length and weight as a representative measurement of body size. Since the model generated from the living subject precisely represents the size and shape of the body, the model is available for the calculation and analysis of body properties.