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Table 8 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 0.24    1 0.72      4 0.24
  4 4 0.40 1 0.45        6 0.37
  5 22 2.61 2 0.90        35 2.14
  6 231 21.39 41 18.55 23 16.55 1 12.50 2 22.22 337 20.56
  7 311 22.35 48 21.72 33 23.74 3 37.50 2 22.22 368 22.45
  8 297 29.48 59 26.70 35 25.18 3 37.50 3 33.33 472 28.80
  9 341 23.53 70 31.67 47 33.81 1 12.50 2 22.22 417 25.44
Total   1209 100.00 221 100.00 139 100.00 8 100.00 9 100.00 1639 100.00
  Thoracolumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.25    1 0.60      4 0.24
  4 3 0.42 1 0.39        6 0.37
  5 21 2.62 4 1.57        35 2.14
  6 230 21.01 54 21.26 27 16.07 4 21.05 3 23.08 337 20.56
  7 295 22.45 54 21.26 40 23.81 4 21.05 4 30.77 368 22.45
  8 273 28.95 67 26.38 54 32.14 6 31.58 2 15.38 472 28.80
  9 331 24.30 74 29.13 46 27.38 5 26.32 4 30.77 417 25.44
Total   1155 100.00 254 100.00 168 100.00 19 100.00 13 100.00 1639 100.00
  Lumbar           
   Symmetry 1 -1 2 -2 Total
   N % N % N % N % N % N %
Age 3 2 0.26    1 0.52      4 0.24
  4 4 0.35 2 0.78        6 0.37
  5 17 2.85 2 0.78        35 2.14
  6 223 20.50 59 23.14 35 18.32 3 12.00 3 25.00 337 20.56
  7 270 22.32 57 22.35 37 19.37 10 40.00 6 50.00 368 22.45
  8 274 29.76 61 23.92 62 32.46 4 16.00 1 8.33 472 28.80
  9 328 23.96 74 29.02 56 29.32 8 32.00 2 16.67 417 25.44
Total   1118 100.00 255 100.00 191 100.00 25 100.00 12 100.00 1639 100.00
  1. Scoliometer readings are at standing 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).