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Table 9 Frequency of symmetry and asymmetry in girls by age (year).

From: Trunk asymmetry in juveniles

  Thoracic           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 3 0.29          4 0.24
  4 4 0.29 2 1.47        6 0.37
  5 24 2.39 2 1.47        35 2.14
  6 256 21.04 30 22.06 16 13.79 1 16.67    337 20.56
  7 336 22.06 28 20.59 33 28.45 3 50.00    368 22.45
  8 329 29.39 33 24.26 32 27.59 2 33.33    472 28.80
  9 396 24.53 41 30.15 35 30.17    3 100.00 417 25.44
Total   1348 100.00 136 100.00 116 100.00 6 100.00 3 100.00 1639 100.00
  Thoracolumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.30          4 0.24
  4 4 0.30 2 1.26        6 0.37
  5 24 2.43 2 1.26 1 0.71      35 2.14
  6 257 21.67 31 19.50 17 12.06 2 16.67 2 16.67 337 20.56
  7 328 22.66 31 19.50 30 21.28 5 41.67 4 33.33 368 22.45
  8 321 28.75 42 26.42 47 33.33 3 25.00 2 16.67 472 28.80
  9 399 23.88 51 32.08 46 32.62 2 16.67 4 33.33 417 25.44
Total   1335 100.00 159 100.00 141 100.00 12 100.00 12 100.00 1639 100.00
  Lumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.31          4 0.24
  4 4 0.31 1 0.56    1 5.88    6 0.37
  5 22 2.43 4 2.23        35 2.14
  6 247 21.14 38 21.23 27 17.31 1 5.88 1 10.00 337 20.56
  7 316 21.85 39 21.79 40 25.64 6 35.29 4 40.00 368 22.45
  8 310 29.37 42 23.46 45 28.85 6 35.29 4 40.00 472 28.80
  9 381 24.59 55 30.73 44 28.21 3 17.65 1 10.00 417 25.44
Total   1282 100.00 179 100.00 156 100.00 17 100.00 10 100.00 1639 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).