| Immediately post-fitting | 6 months after fitting | ||
VAS at rest | VAS on mobilization | VAS at rest | VAS on mobilization | |
Median gain ± SD | −1 ± 1 | −2 ± 1 | 1 ± 1 | 2 ± 2.031 |
Minimal gain | −5 | −5 | −2 | −5 |
Maximal gain | 3 | 4 | 4 | 3 |
p | 0.014* | <0.001** | 0.001** | 0.002** |