Outcome measures | ||
EQ-5D | Â | P |
 Before surgery | 0.57 ± 0.18 | < 0.001 |
 1 year after surgery | 0.67 ± 0.17 |  |
C-JOA sore | Â | Â |
 Before surgery | 11.0 ± 2.6 | < 0.001 |
 1 year after surgery | 13.1 ± 2.3 |  |
Nurick grade | Â | Â |
 Before surgery | 2.7 ± 1.0 | < 0.001 |
 1 year after surgery | 2.1 ± 1.2 |  |