[Retracted] Clinical Efficacy and Safety of Anterior Cervical Decompression versus Segmental Fusion and Posterior Expansive Canal Plasty in the Treatment of Multilevel Cervical Spondylotic Myelopathy

Table 4

Comparison of JOA score before and after the operation.

Subgroup analysis	Case (n)	Preoperative	3 months after surgery	6 months after surgery
Anterior group	34	8.25 ± 0.75	16.25 ± 0.75	14.65 ± 0.46
Posterior group	22	8.25 ± 0.88	13.55 ± 0.38	12.46 ± 0.55
t		0.852	12.215	9.045
		0.082	0.001	0.001