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Effect of baseline risk factors on reduction in hip fracture with zoledronic acid 5 mg at 3 yr (strata I and II). OP, Osteoporosis (femoral neck T-score ≤−2.5); VFx, vertebral fracture; BP, bisphosphonate; CrCl, creatinine clearance; ZOL, zoledronic acid; CI, confidence interval.
