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 |