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Table 2 Comparison of results for static posturography obtained with normal standing, eyes open (NS EO) and eyes closed (NS EC) positions in the THR and control groups (Mann-Whitney test)

From: Does total hip replacement impact on postural stability?

   NS EO NS EC
variable group mean (SD) min - max median p mean ± SD min - max median p
Y(mm/s) THR control 7.24 (2.33) 3.5–12.3 7.05 0.014 11.77 (4.04) 4.4–20.4 11.5 0.021
5.94 (2.58) 2.6–14.6 4.95 9.57 (3.55) 5.0–17.2 8.7
X (mm/s) THR control 3.16 (0.96) 1.6–5.7 3.05 0.214 3.98 (1.44) 1.5–7.1 3.9 0.882
2.87 (1.10) 1.5–5.8 2.55 4.08 (1.77) 2.1–8.3 3.8
spectrum Y (Hz) THR control 0.365 (0.131) 0.149–0.640 0.366 0.965 0.391 (0.154) 0.197–0.745 0.354 0.023
0.391 (0.179) 0.205–0.831 0.341 0.490 (0.184) 0.155–0.998 0.470
spectrum Y (mm) THR control 0.369 (0.061) 0.276–0.564 0.363 0.109 0.449 (0.103) 0.271 ± 0.659 0.411 0.013
0.345 (0.049) 0.245–0.474 0.335 0.381 (0.067) 0.263 ± 0.507 0.386
spectrum X (Hz) THR control 0.272 (0.145) 0.102–0.689 0.237 0.595 0.284 (0.146) 0.113–0.750 0.265 0.442
0.239 (0.090) 0.118–0.457 0.205 0.314 (0.159) 0.134–0.620 0.269
spectrum X (mm) THR control 0.101 (0.043) 0.047–0.257 0.089 0.620 0.123 (0.042) 0.045–0.207 0.115 0.290
0.095 (0.040) 0.041–0.179 0.091 0.116 (0.055) 0.056–0.321 0.105
  1. p < 0.05