Vitamin D prophylaxis v a control condition (eg, calcium or placebo) in older persons at 3 months to 3 years*
| Outcome | Number of trials (n) | Weighted event rates | RRR (95% CI) | NNT (CI) | |
|---|---|---|---|---|---|
| Vitamin D | Control | ||||
| *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) |