Table 2 Multivariable logistic regression analysis using stepwise method for union status at 6 months after treatment

Age (<80 vs. ≥80 years)

0.205

2.21 (0.65 – 8.11)

Gender

Fracture level (TL vs. non-TL)

0.001*

11.67 (2.48 – 83.17)

BMD at lumbar spine (≤ − 2.5 vs. > − 2.5 SD)

0.001*

11.68 (2.48 – 83.17)

Pre-existing VCF

Posterior wall fracture

0.001*

8.53 (2.25 – 42.23)

Past bisphosphonate use

0.019*

4.86 (1.29 – 22.09)

Pharmaceutical agents (TPD vs. BP)

0.002*

8.15 (2.02 – 43.33)