Table 1

Diameters, nerve-to-muscle CNRs, and CNR score in patients with CIDP and control patients

CIDP (n=15)Control (n=29)p Value*
Diameter (mm)
 C53.89±1.363.75±1.090.92
 C65.31±1.524.80±1.160.32
 C75.70±1.734.93±1.140.16
 C84.91±1.724.30±0.750.36
Nerve-to-muscle CNR
 C532.68±24.7616.63±11.210.03
 C636.76±24.2620.06±15.030.02
 C734.75±24.7515.92±8.400.01
 C830.09±22.8718.49±17.510.04
CNR score134.29±93.7971.10±42.850.01
  • *Wilcoxon rank-sum test.

  • CIDP, chronic inflammatory demyelinating polyradiculoneuropathy; CNR, contrast-to-noise ratio; CNR score, the sum of nerve-to-muscle CNRs for C5–C8 nerve roots on the employed side.