Table 2. Summary of multivariate logistic regression analysis of the bone union.

Variables	P	OR	95% CI
Age	<0.01*	0.69	0.37–0.88
Gender	0.59	2.59	0.07–201.32
Cage(Ti)	<0.01*	5.62×10–3	21.7–infinity
Vertebral slip	<0.01*	0.18	2.03×10–3–0.71
% depth	<0.01*	1.41	1.06–2.61
Cage position	<0.01*	4.61×10–3	0–1.66×10–3

*, P<0.05. OR, odds ratio; CI, confidence interval.