Table 2.

Univariate and multivariate logistic regression analysis for SSF.

Variable	Univariate		Multivariate
	OR (95% CI)	P Value	OR (95% CI)	P Value
Age ≤39 y	0.72 (0.48–1.09)	0.075	1.72 (1.03–2.87)	0.038
Men	0.76 (0.48–1.19)	0.223
Public hospital	0.60 (0.36–0.99)	0.046
Hypertension	0.29 (0.10–0.86)	0.018	0.25 (0.08–0.81)	0.021
Diabetes mellitus	0.82 (0.29–2.31)	0.699
Obesity	1.67 (0.52–5.36)	0.282
Smoker	0.91 (0.43–1.96)	0.817
Preoperative medical instability	0.33 (0.19–0.59)	<0.001
Implant availability	1.33 (0.80–2.21)	0.268
AO Spine injury
B2	5.01 (3.09–8.13)	<0.001	3.54 (1.80–6.96)	<0.001
B3	2.37 (0.82–6.91)	0.094	9.41 (2.23–39.61)	0.002
C	0.15 (0.09–0.26)	<0.001
Level of injury
Upper thoracic	0.16 (0.06–0.41)	<0.001	0.11 (0.03–0.38)	0.001
Midthoracic	0.25 (0.12–0.52)	<0.001	0.17 (0.05–0.52)	0.002
Thoracolumbar	3.63 (2.25–5.86)	<0.001
Lumbar	1.73 (0.82–3.65)	0.144
Neurological status
AIS A	0.12 (0.06–0.24)	<0.001	0.32 (0.13–0.78)	0.012
AIS B	0.47 (0.17–1.40)	0.167
AIS C	0.83 (0.36–1.91)	0.654
AIS D	1.68 (0.82–3.44)	0.151
AIS E	3.84 (2.45–6.01)	<0.001

Abbreviations: AIS, ASIA Impairment Scale; ASIA, American Spinal Injury Association; SSF, short-segment fixation;

^aFisher’s exact test.