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

Table 5

Preoperative ISH and postoperative JOA outcome^a.

Preoperative ISH (mm)	ACDR		ACDF		value
	N	Postoperative JOA	N	Postoperative JOA
≤4	20	11.88 ± 1.700	21	12.95 ± 1.516	0.0383^b
>4	27	11.72 ± 1.631	25	12.04 ± 1.952	0.5259

^aValues are presented as mean ± standard deviation. ^bSignificant difference between ACDR and ACDF. Abbreviations: ISH, intervertebral space height; JOA, Japanese Orthopedic Association.