Effect of early treatment with zoledronic acid on prevention of bone loss in patients with acute spinal cord injury: a randomized controlled trial.

STUDY DESIGN: Randomized controlled trial.

OBJECTIVES: To determine the effect of zoledronic acid on bone loss in people with acute spinal cord injury (SCI) SETTINGS: Sawai Man Singh Medical College, India.

METHODS: Sixty patients with acute SCI were randomized to receive either standard treatment alone or standard treatment with zoledronic acid within 3 months after injury. Areal bone mineral density (aBMD) was measured at the hip using dual-energy X-ray absorptiometry (DXA) at baseline 3, 6, and 12 months.

RESULTS: Significant differences in aBMD were found between the standard treatment alone and standard treatment plus zoledronic acid group at the femoral neck (-0.13; 95% CI, -0.18 to -0.09, p < 0.0001), and total hip (-0.16; 95% CI, -0.19 to -0.12, p < 0.0001), respectively, at 1 year and bone loss was reduced in the zoledronic acid treated group as compared to the standard treatment group. Significant differences in aBMD between the groups at 6 months post infusion was also observed at these sites. [Femoral neck -0.08; 95% CI, -0.12 to -0.03; p = 0.002 and total hip -0.12; 95% CI, -0.15 to -0.08; p < 0.0001] CONCLUSION: A zoledronic acid 5 mg infusion given within 3 month significantly reduces bone loss at the hip after 6 months post infusion in patients with acute SCI.