Table 2 Comparisons of the GVMBT with the BBS and the TUG: floor and ceiling effects
| Measurement instruments (Range of scores) |
Skewness [95%CI] p- value |
Kurtosis [95%CI] p- value | Floor effect (% participants with lowest possible score) | Ceiling effect (% participants with highest possible score) |
|---|---|---|---|---|
| GVMBT (0–28 points) |
−0.19 [− 0.87;0.49] 0.29 |
−1.10 [−2.46;0.26] 0.06 | 0 | 2 |
| BBS (0–56 points) |
−1.06 [− 1.74;− 0.39] 0.001** |
0.40 [− 0.96;1.76] 0.28 | 0 | 14 |
| TUG (time in seconds) |
0.68 [0.01;1.36] 0.02* |
-0.39 [−1.74;0.97] 0.29 | NA | NA |