[Retracted] Clinical Application of Evoked Potentials in the Operation of Cervical Spondylotic Myelopathy with Different Imaging

Table 3

Relationship between the changes of intramedullary signal and the improvement rate of the two groups of patients (M ± SD, %).

	Case group	Control group	T	P-value
Cases	30	30
Preoperative	7.53 ± 1.50	9.25 ± 1.72	4.128	P < 0.05
1 week after operation	15.21 ± 1.34	10.22 ± 1.82	12.09	P < 0.05
24 week after operation	18.22 ± 1.43	12.31 ± 1.56	15.30	P < 0.05
Improvement rate %	72.5	42.3