Table 5. The relation between DTI parameters with clinical stage and electrophysiological stage.

DTI parameters	Electrophysiological stage (P value)	Clinical stage (P value)
dFA	0.35	0.129
d, i, mMD	>0.05	>0.05
d, i, m, oRD	>0.05	>0.05
d, i, m, oAD	>0.05	>0.05
iFA	0.174	0.011
mFA	0.075	0.03
oFA	0.035	0.082
oMD	0.042	0.265
Delta FA	0.504	0.209
Delta MD	0.389	0.186

DTI, diffusion tensor imaging; d, i, m, and o, at the distal radioulnar joint, inlet, middle, and outlet of the carpal tunnel, respectively; FA, fractional anisotropy; MD, mean diffusivity; AD, axial diffusivity; RD, radial diffusivity; DeltaFA = oFA – dFA; DeltaMD = oMD – dMD.