Table 3.

Radiographic parameters before vertebroplasty, the DND group vs. the control group

Radiographic parameters	DND group (n = 30)	Control group (n = 60)	Odds ratio
Local kyphotic angle (°)	17.0 ± 8.8	15.6 ± 7.7	[0.94; 95 % [CI] 0.88–1.04; P = 0.31]
Percent spinal canal compromise (%)†	35.4 ± 13.1	23.1 ± 11.1	[1.10; 95 % [CI] 1.05–1.17; P < 0.001]
Intravertebral instability (°)†	10.6 ± 5.9	5.3 ± 3.3	[1.43; 95 % [CI] 1.18–1.73; P < 0.001]

Plus-minus values are mean ± SD. Logistic regression analysis with multivariate models shows independence and specific correlation between the radiographic parameters and DND [odds ratio; 95 % confidence interval (CI); P value]

DND delayed neurologic deficit

^†P < 0.001 for the comparison by the Mann–whitney U test between the two groups