Table 3.

Postural balance parameters – comparison between preoperative and postoperative time points

	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

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