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) |