Vitamin D prophylaxis v a control condition (eg, calcium or placebo) in older people*
| Outcome (3 mo to 3 y) | Number of RCTs (n) | Weighted event rates | RRR (95% CI) | NNT (CI) | |
|---|---|---|---|---|---|
| Vitamin D | Control | ||||
| *RCTs = randomised controlled trials. Other abbreviations defined in glossary; weighted event rates, RRR, NNT, and CI calculated from data in article using a random-effects model. | |||||
| Participants who had ⩾1 fall | 5 (1237) | 30% | 37% | 19% (6 to 31) | 15 (9 to 52) |
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