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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

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

  Pearson r (p-value)
Young Adults (n = 13) Older Adults (n = 16)
SVVα SVHα SVVα SVHα
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)