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Table 7 Frequency of symmetry and asymmetry in boys by age (year).

From: Trunk asymmetry in juveniles

  Thoracic           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 3 0.22          3 0.18
  4 4 0.30          4 0.25
  5 24 1.78 1 0.70        25 1.53
  6 256 18.99 24 16.78 28 21.88 2 33.33    310 19.03
  7 336 24.93 42 29.37 30 23.44 1 16.67    409 25.11
  8 329 24.41 34 23.78 30 23.44    3 75.00 396 24.31
  9 396 29.38 42 29.37 40 31.25 3 50.00 1 25.00 482 29.59
Total   1348 100.00 143 100.00 128 100.00 6 100.00 4 100.00 1629 100.00
  Thoracolumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.15 1 0.69        3 0.18
  4 4 0.30          4 0.25
  5 24 1.80 1 0.69        25 1.53
  6 257 19.25 21 14.58 30 23.26 1 7.69 1 12.50 310 19.03
  7 328 24.57 41 28.47 34 26.36 3 23.08 3 37.50 409 25.11
  8 321 24.04 36 25.00 33 25.58 3 23.08 3 37.50 396 24.31
  9 399 29.89 44 30.56 32 24.81 6 46.15 1 12.50 482 29.59
Total   1335 100.00 144 100.00 129 100.00 13 100.00 8 100.00 1629 100.00
  Lumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.16 1 0.55        3 0.18
  4 4 0.31          4 0.25
  5 22 1.72 1 0.55 1 0.73 1 5.26    25 1.53
  6 247 19.27 36 19.78 21 15.33 3 15.79 3 33.33 310 19.03
  7 316 24.65 49 26.92 35 25.55 7 36.84 2 22.22 409 25.11
  8 310 24.18 44 24.18 34 24.82 5 26.32 3 33.33 396 24.31
  9 381 29.72 51 28.02 46 33.58 3 15.79 1 11.11 482 29.59
Total   1282 100.00 182 100.00 137 100.00 19 100.00 9 100.00 1629 100.00
  1. Scoliometer readings are at sitting forward bending position. 1: mild right asymmetry (ATR 1–6o), 2: severe right asymmetry (ATR ≥ 7o), -1 mild left asymmetry (ATR 1–6o), -2: severe left asymmetry (ATR ≥ 7o).
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Scoliosis and Spinal Disorders

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