Table 4 Summary of the characteristics of the responders and the non-responders
|  | Responders (n = 25) | Non-responders (n = 12) | P value |
|---|---|---|---|
Age, yr. | 59.4 (8.2) | 60.8 (6.1) | 0.618 |
Male | 9 (36.0%) | 4 (33.3%) | 0.874 |
Left side | 9 (36.0%) | 2 (16.7%) | 0.228 |
Duration, mo. | 97.9 (91.5) | 81.8 (87.7) | 0.616 |
Pre-rhizotomy VAS | 9.5 (0.7) | 8.7 (1.2) | 0.059 |
Pre-rhizotomy lesion side | |||
 Volume (mm3) | 47.2 (18.0) | 51.7 (20.6) | 0.496 |
 Fractional anisotropy | 0.277 (0.104) | 0.249 (0.064) | 0.402 |
 Apparent diffusion coefficient (*10−3) | 1.617 (0.261) | 1.690 (0.268) | 0.434 |
 Axial diffusivity (*10−3) | 2.058 (0.241) | 2.110 (0.251) | 0.548 |
 Radial diffusivity (*10−3) | 1.396 (0.306) | 1.480 (0.288) | 0.434 |
Post-rhizotomy lesion side | |||
 Volume (mm3) | 49.7 (22.6) | 70.4 (24.9) | 0.016* |
 Fractional anisotropy | 0.302 (0.043) | 0.315 (0.066) | 0.475 |
 Apparent diffusion coefficient (*10−3) | 1.470 (0.169) | 1.513 (0.235) | 0.527 |
 Axial diffusivity (*10−3) | 1.930 (0.216) | 2.000 (0.300) | 0.424 |
 Radial diffusivity (*10−3) | 1.240 (0.155) | 1.269 (0.221) | 0.641 |