Comparison of Radiographic Reconstruction and Clinical Improvement between Artificial Cervical Disc Replacement and Anterior Cervical Discectomy and Fusion

Table 3

Pain relief and dysfunction improvement^a.

Group		ACDR	ACDF
VAS	Preoperative	7.617 ± 1.114	7.674 ± 1.055
	Follow-up	1.511 ± 0.5053	1.435 ± 0.5437
	value (preop vs. follow-up)	<0.001^b	<0.001^b
NDI	Preoperative	80.68 ± 5.129	79.30 ± 5.219
	Follow-up	26.26 ± 17.210	27.70 ± 14.250
	value (preop vs. follow-up)	<0.001^b	<0.001^b
JOA	Preoperative	6.120 ± 1.156	6.554 ± 1.671
	Follow-up	11.850 ± 1.609	12.460 ± 1.807
	value (preop vs. follow-up)	<0.001^b	<0.001^b

^aValues are presented as mean ± standard deviation or number of cases. ^bSignificant difference compared with preoperative values. Abbreviations: VAS, Visual Analogue Scale; NDI, Neck Disability Index; JOA, Japanese Orthopedic Association.