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Table 3 Postural balance parameters – comparison between preoperative and postoperative time points

From: Adolescent idiopathic scoliosis: evaluating perioperative back pain through a simultaneous morphological and biomechanical approach

  Preoperative 6 weeks P 6 months P
Pressure left foot 46.50 ± 5.46 46.38 ± 6.58 0.938 44.98 ± 6.29 0.412
Pressure right foot 53.50 ± 5.46 53.62 ± 6.58 0.938 55.02 ± 6.29 0.412
Back feet pressure 60.08 ± 8.06 58.82 ± 12.82 0.584 62.45 ± 9.31 0.290
Mid-feet pressure 21.37 ± 5.31 22.05 ± 0.84 0.611 21.07 ± 7.76 0.854
Forefeet pressure 18.55 ± 4.81 19.13 ± 7.18 0.722 16.48 ± 6.40 0.202
Left anterior/posterior CoP −46.80 ± 11.25 −42.06 ± 21.39 0.282 −52.45 ± 18.94 0.217
Left medial/lateral CoP −2.51 ± 1..98 −1.33 ± 2.65 0.017* −2.13 ± 3.43 0.547
Right anterior/posterior CoP −47.55 ± 8.68 −45.21 ± 14.69 0.513 −48.89 ± 12.98 0.666
Right medial/lateral CoP −2.53 ± 2.39 −3.38 ± 3.12 0.200 − 2.89 ± 2.92 0.732
Left foot CoP velocity 71.11 ± 29.61 71.91 ± 23.99 0.919 69.02 ± 22.46 0.723
Right foot CoP velocity 52.24 ± 13.57 54.69 ± 13.93 0.414 56.46 ± 12.44 0.230
Left foot CoP trace length 1.43 ± 0.51 1.44 ± 0.56 0.966 1.38 ± 0.53 0.739
Right foot CoP trace length 1.08 ± 0.36 1.09 ± 0.33 0.970 1.13 ± 0.32 0.706
Left foot sway area 23.99 ± 18.24 23.36 ± 13.59 0.873 24.95 ± 19.77 0.855
Right foot sway area 20.04 ± 24.71 14.87 ± 7.09 0.395 13.96 ± 5.33 0.295
  1. All results are shown as mean ± standard deviation. Pressures are shown as proportions. Pressure units are in (N/cm2), Centre of Pressure (CoP) is measured in (mm), Velocity is measured in (mm/s), Trace Length in (m), and Sway Area in (mm2). P vales are given regards to the preoperative and their associated postoperative time point values. Paired Student’s t-test, * = significance was reached when p < 0.05