Table 4

Correlation between baseline radiographic measurements and perioperative change in segmental sagittal Cobb angle.

Measurement	Unstandardized Coefficients		Standardized Coefficient		P Value
Measurement	B	Standard Error	Beta	t	P Value
Preoperative segmental sagittal Cobb angle, °	−0.4	0.1	−0.5	−5.7	0.01
Preoperative disc space height, mm	−0.2	0.1	−0.2	−1.7	0.09
Preoperative osteophytes grade^{^a}	−0.3	0.6	−0.05	−0.5	0.59
Preoperative facet joint degeneration grade^{^b}	−0.1	0.3	−0.02	−0.2	0.81
Anatomic level	0.8	0.4	0.2	1.9	0.06
Preoperative coronal Cobb angle, °	0.1	0.1	0.2	2.3	0.02

↵a Three grades: I, nonbridging disc space osteophytes; II, small bridging disc space osteophytes; III, ankylosed disc space.
↵b Three grades: I, nonbridging osteophytes of the facet joint; II, small bridging osteophytes of the facet joint; III, ankylosed facet joint.