TABLE 3.

Spondylosis Anterioposterior Dimension Ratio

	3 mo	6 mo	9 mo	12 mo
SBG Rab	1.11 (0.72–1.45)	1.34 (1.17–1.55)	1.33 (1.21–1.48)	1.32 (1.19–1.45)
Control Rab	1.13 (0.99–1.18)	1.26 (1.02–1.43)	1.32 (0.99–1.64)	1.36 (1.05–1.60)

Comparison of spondylosis anterioposterior dimension ratio (R_ab) calculated as spondylosis anterioposterior dimension 12 months after surgery (a) divided by disc space anterioposterior dimension before surgery (b) for synthetic bone graft (SBG) and control levels. R_ab reported as the median (range). R_ab was compared by using multiple Wilcoxon test corrected for multiple comparisons.

Statistical significance was set at P<0.05.