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. 2009 Oct 1;339:b3692. doi: 10.1136/bmj.b3692

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graphic file with name ferh608828.f2_default.jpg — Fig 2 Fall prevention with high dose (700-1000 IU a day) and low dose (200-600 IU a day) of supplemental vitamin D. Boxes represent relative risks, and the size of the boxes is proportional to the size of the high dose supplemental vitamin D trials included in the primary analysis. Error bars represent 95% confidence intervals. Shaded boxes indicate trials with vitamin D_3, and white boxes indicate those with vitamin D₂