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Table 5 Comparison of results for static posturography obtained in the second form of tandem position in the THR and control groups (Student’s t-testa, Welch testb, Mann-Whitney test)

From: Does total hip replacement impact on postural stability?

   2TOF vs. 2TC 2TNF vs. 2TC
variable group mean (SD) min - max median p mean (SD) min - max median p
Y (mm/s) THR control 13.12 (3.08) 7.3–19.8 13.4 0.099 13.20 (3.69) 7.5–23.3 12.7 0.165
12.05 (3.84) 7.5–21.2 11.1 12.05 (3.84) 7.5–21.2 11.1
X (mm/s) THR control 17.37 (4.31) 10.5–27.8 16.75 0.106a 17.74 (4.43) 9.7–27.5 17.5 0.055a
15.61 (4.00) 7.8–24.2 14.7 15.61 (4.00) 7.8–24.2 14.7
spectrum Y (Hz) THR control 0.402 (0.159) 0.164–0.833 0.351 0.423a 0.437 (0.245) 0.186–1.266 0.375 0.348
0.433 (0.135) 0.216–0.707 0.440 0.433 (0.135) 0.216–0.707 0.440
spectrum Y (mm) THR control 0.468 (0.139) 0.280–0.851 0.427 0.695 0.454 (0.129) 0.306–0.835 0.432 0.923
0.436 (0.074) 0.330–0.589 0.432 0.436 (0.074) 0.330–0.589 0.432
spectrum X (Hz) THR control 0.441 (0.171) 0.199–1.010 0.416 0.657 0.448 (0.150) 0.213–0.863 0.418 0.229b
0.409 (0.088) 0.246–0.549 0.419 0.409 (0.088) 0.246–0.549 0.419
spectrum X (mm) THR control 0.472 (0.102) 0.298–0.706 0.444 0.089a 0.468 (0.118) 0.266–0.805 0.465 0.147a
0.426 (0.105) 0.207–0.664 0.421 0.426 (0.105) 0.207–0.664 0.421