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Table 4 Summary of the characteristics of the responders and the non-responders

From: Diffusion tensor imaging for assessment of microstructural changes associate with treatment outcome at one-year after radiofrequency Rhizotomy in trigeminal neuralgia

  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
  1. Note – The values are the mean (standard deviation) or number (percentage)
  2. *P < 0.05 was considered to indicate a significant difference