Immediate zoledronate (4 mg IV, every six months) significantly increased bone mineral density at both the hip (5.4%–6.7% higher than delayed) and the spine (8.6%–9.3%higher than delayed) in the ZO-FAST and Z-FAST trials, as well as in meta-analysis of the combined data (hip: 3.4% higher than delayed; spine: 5.1% higher than delayed).