Table 2 Pearson correlation (r) obtained between each Visuo-Postural Dependency Indices (VPDI) and the absolute residual angle from either subjective visual vertical or horizontal test (SVVα and SVHα, respectively). Note: adjusted p-value considered for inferential statistics is 0.0029

VPDI COP_median_freq_ap (%)

0.12 (0.714)

− 0.07 (0.833)

0.07 (0.797)

0.08 (0.773)

VPDI COP_mean_vel_ap (%)

0.75 (0.005)

0.05 (0.869)

−0.18 (0.497)

−0.16 (0.563)

VPDI COP_area (%)

0.54 (0.069)

0.08 (0.810)

−0.30 (0.258)

−0.06 (0.818)

VPDI COP_total_mean_vel (%)

−0.09 (0.774)

−0.22 (0.500)

0.26 (0.329)

0.27 (0.317)

VPDI COP_range_ap (%)

0.76 (0.004)

0.05 (0.877)

−0.28 (0.293)

−0.22 (0.423)

VPDI COP_mean_jerk_ap (%)

0.02 (0.943)

−0.01 (0.965)

0.37 (0.162)

0.32 (0.224)

VPDI COP_total_mean_jerk (%)

−0.20 (0.526)

−0.08 (0.808)

0.25 (0.354)

0.35 (0.185)

VPDI COP_sent_ap (%)

−0.21 (0.522)

−0.05 (0.888)

0.03 (0.920)

0.20 (0.453)

VPDI COP_rms_ap (%)

−0.12 (0.721)

−0.20 (0.525)

0.65 (0.007)

0.44 (0.087)

VPDI COP_mean_vel_ml (%)

−0.41 (0.184)

−0.40 (0.201)

− 0.09 (0.745)

−0.19 (0.484)

VPDI COP_range_ml (%)

−0.42 (0.169)

−0.37 (0.241)

− 0.17 (0.523)

−0.20 (0.452)

VPDI COP_rms_ml (%)

−0.20 (0.527)

−0.40 (0.202)

0.13 (0.630)

−0.12 (0.661)

VPDI COP_total_length (%)

−0.68 (0.015)

−0.04 (0.908)

0.23 (0.395)

0.18 (0.509)

VPDI COP_median_freq_ml (%)

−0.17 (0.597)

−0.22 (0.488)

0.11 (0.678)

0.02 (0.947)

VPDI COP_mean_jerk_ml (%)

−0.76 (0.004)

−0.20 (0.542)

0.32 (0.224)

0.24 (0.366)

VPDI COP_sent_ml (%)

−0.19 (0.545)

−0.16 (0.619)

− 0.09 (0.742)

−0.25 (0.341)

VPDI COP_crosssent (%)

−0.35 (0.264)

−0.30 (0.337)

0.17 (0.532)

−0.07 (0.793)