Table 1.
The descriptive statistics and differences in results of the pre-exposure postural stability tests with eyes open (EO) and eyes closed (EC).
| Variables | EO | EC | Tested value a | |||
|---|---|---|---|---|---|---|
| Me ±IQR | Min-max | Me ±IQR | Min-max | Z | P-value | |
| SP pre (mm) | 178.0 ± 37.0 | 120.0–235.0 | 238.5 ± 43.0 | 184.0–449.0 | 4.143 | <0.001 |
| MA pre (mm) | 1.6 ± 1.5 | 1.1–5.3 | 3.0 ± 1.7 | 1.5–9.9 | 3.300 | <0.001 |
| SA pre (mm2) | 85.0 ± 79.5 | 46.0–339.0 | 194.5 ± 120.0 | 92.0–730.0 | 3.771 | <0.001 |
| MF pre (Hz) | 0.49 ± 0.31 | 0.17–0.87 | 0.44 ± 0.24 | 0.14–0.87 | 1.814 | 0.069 |
a
The Wilcoxon signed-ranks test, asymptotic significance (2-sided).
SP Pre, pre-exposure length of sway path; MA Pre, pre-exposure mean amplitude; SA Pre, pre-exposure sway area; MF Pre, pre-exposure mean frequency; Me, median; IQR, inter-quartile range; Min-Max, minimum and maximum values.
Bolded p-values are statistically significant (α ≤ 0.05).