Prevalence Study of Trunk Asymmetries and Structural Scoliosis in 10-Year-Old School Children

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Abstract
The prevalence of trunk asymmetries was studied in 6464, 10-yr-old, school children. All those with visible trunk asymmetries were moire photographed and a subjet roentgenographed. Moire, positive findings were seen in 13% of the boys and in 16% of the girls. A more prominent moire asymmetry (a deviation of .gtoreq. 2 moire contour lines) was seen in 0.6% of the boys and 0.9% of the girls. The Cobb angles in this latter group varied between 14.degree. and 25.degree.. Children with small clinical and moire asymmetries (deviations of < 1 moire fringe) had no or very small (<10.degree.), lateral deviations seen on the X-ray and should, therefore, be regarded rather as normal variations of the shape of the trunk. These small asymmetries cannot be disregraded as possible indications of a risk group in which structural scoliosis can develop later during the period of growth.

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