Table 4.

Univariable and multivariable of factors associated with failure

Variable	Univariable		Multivariable
	OR (95% CI)	p-value	aOR (95% CI)	p-value
BMD T-score < -2.1*	32.6 (3.0–351.9)	0.004
O-arm navigated vs. nonnavigated	0.2 (0.02–1.3)	0.09	0.2 (0.02–3.1)	0.27
Reducible disc height < 13%	6.7 (1.8–25.4)	0.005	18.9 (3.8–93.9)	< 0.001
Postoperative disc height < 10 mm	5.1 (2.0–12.8)	0.001	3.6 (0.98–12.9)	0.054
Fixation		0.02		0.21
Lateral screw-rod or posterior PDS	1 (ref)		1 (ref)
Anterolateral plate	5.6 (1.7–18.7)	0.005	3.4 (0.8–13.9)
Standalone	1.5 (0.2–13.9)	0.71	2.5 (0.2–28.6)
High-grade subsidence	15.6 (4.8–50.6)	< 0.001	13.9 (3.4–56.0)	< 0.001

OR, odds ratio; aOR, adjusted OR; PDS, pedicular screw; BMD, bone mineral density.

^*Since BMD was available in only 35% of patients, we were unable to include this variable in the multivariate model.