Table 4.

Comparison of metric ratios

MCL: rostral ratio	Uncompressed (n=20)	Compressed (n=20)	P values
CSA	1.050±0.060	1.003±0.106	0.09*
FA	0.917±0.054	0.878±0.056	0.06*
MTR	0.954±0.042	0.960±0.033	0.56
T2*WI WM/GM	1.005±0.029	1.001±0.025	0.67

Ratios were calculated by dividing MCL metric values by rostral values.

*Denotes significance (p<0.05).

CSA, cross-sectional area; DCM, degenerative cervical myelopathy; FA, fractional anisotropy; MCL, maximally compressed level; MTR, magnetisation transfer ratio; T2*WI WM/GM, T2*-weighted imaging white to grey matter.