Surgical outcomes of anterior column reconstruction for spinal fractures caused by minor trauma-preoperative examination of the number of intervertebral bone bridges is key to obtaining good bone fusion-

Table 3 Characteristics of the maxVB = 0 and maxVB ≥ 2 groups adjusted for the confounding factors of bone fusion

Characteristics	Beta	95% CI	p value
maxVB = 0	—	—
maxVB ≥ 2	1	0.47–1.5	< 0.001**
Age	0.01	−0.02–0.04	0.6
Sex	−0.28	−0.84–0.29	0.3
Fracture types
A1	—	—
A3	−0.27	−1.4–0.83	0.6
A4	−0.38	−1.5–0.73	0.5
B1	−1.8	−4.0–0.37	0.1
B3	−0.46	−1.8–0.83	0.5
Smoking history	−0.76	−1.5–−0.02	0.4
DM history	0.07	−0.46–0.60	0.8
Femur proximal BMD (g/cm²)	−0.25	−3.7–3.2	0.9
Osteoporosis drugs
None	—	—
Bone formation stimulants	−0.31	−0.87–0.25	0.3
Bone resorption inhibitors	−0.2	−1.0–0.58	0.6
Others	0.28	−1.2–1.8	0.7
Surgical techniques
Unilateral side screw fixation	—	—
Pedicle screw	0.87	0.24–1.5	0.08
Number of fixed vertebrae	−0.28	−0.48–−0.08	0.08
Materials used for the anterior props
Iliac bone	—	—
Expandable cage	−0.22	−0.95–0.51	0.6

P values < 0.05* and < 0.001** were considered to indicate statistical significance
Abbreviations
DM, diabetes mellitus; BMD, bone mineral density; min, minutes; maxVB, maximum number of vertebral bodies that are bony cross-linked with contiguous adjacent vertebrae; CI, confidence interval

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