Skip to main content

Table 1 Median and quartiles of Visuo-Postural Dependency Index (VPDI) across participants (n = 102) for each postural index computed from center of pressure (COP) signals recorded during bipedal stance with eyes opened and closed. Results from Wilcoxon One-Sample test (visual input effect), Mann-Whitney U test (gender effect), and Pearson correlation test (age correlation) are presented

From: Visuo-postural dependency index (VPDI) in human postural control

  vpdi (%) Visual Input Effect (wilcoxon one-sample test) Gender Effect (Mann-Whitney U test) Age CORRELATION (Pearson test)
  Median (Q1, Q3) p-value U, z (p-value) r (p-value)
VPDI COP_median_freq_ap (%) 45.87 (5.64, 96.52) <  0.001* 1018.0, − 0.060 (0.952) − 0.18 (0.065)
VPDI COP_mean_vel_ap (%) 40.58 (18.20, 59.24) <  0.001* 912.0, − 0.855 (0.393) − 0.29 (0.003)
VPDI COP_area (%) 40.50 (5.02, 92.42) <  0.001* 891.0, − 1.012 (0.311) − 0.15 (0.140)
VPDI COP_total_mean_vel (%) 30.41 (14.73, 50.18) <  0.001* 881.0, − 1.087 (0.277) − 0.28 (0.005)
VPDI COP_range_ap (%) 25.38 (2.66, 48.28) <  0.001* 922.0, − 0.780 (0.435) − 0.11 (0.292)
VPDI COP_mean_jerk_ap (%) 23.70 (7.33, 38.29) <  0.001* 968.5, − 0.431 (0.666) − 0.29 (0.003)
VPDI COP_total_mean_jerk (%) 17.79 (5.51, 30.39) <  0.001* 934.5, − 0.686 (0.493) − 0.27 (0.006)
VPDI COP_sent_ap (%) 16.90 (− 0.08, 39.68) <  0.001* 1011.50, − 0.109 (0.913) − 0.20 (0.047)
VPDI COP_rms_ap (%) 13.80 (− 3.05, 37.65) <  0.001* 938.0, − 0.660 (0.509) − 0.07 (0.497)
VPDI COP_mean_vel_ml (%) 13.36 (3.37, 28.74) <  0.001* 915.0, − 0.832 (0.405) − 0.17 (0.086)
VPDI COP_range_ml (%) 13.32 (−5.84, 40.90) <  0.001* 991.0, − 0.262 (0.793) − 0.14 (0.170)
VPDI COP_rms_ml (%) 11.99 (− 4.21, 31.62) <  0.001* 891.0, − 1.012 (0.311) − 0.15 (0.145)
VPDI COP_total_length (%) 11.44 (− 1.6, 32.22) <  0.001* 907.0, − 0.889 (0.372) − 0.10 (0.324)
VPDI COP_median_freq_ml (%) 10.19 (−17.82, 41.46) 0.002* 961.0, − 0.487 (0.626) − 0.08 (0.421)
VPDI COP_mean_jerk_ml (%) 8.87 (0.91, 17.60) <  0.001* 906.0, − 0.900 (0.368) − 0.17 (0.096)
VPDI COP_sent_ml (%) 0.99 (−10.15, 16.30) 0.384 1012.00, − 0.105 (0.916) − 0.01 (0.954)
VPDI COP_crosssent (%) −2.96 (− 21.09, 13.02) 0.206 989.00, − 0.277 (0.781) 0.07 (0.468)
  1. * p < 0.0029