Calcium v placebo to prevent fractures in elderly women at 5 years*
| Participants | Site of fracture | Calcium | Placebo | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, RRI, NNT, NNH, and CI calculated from data in article. | |||||
| All | Any | 15% | 17% | 12% (−11 to 31) | Not significant |
| Appendicular | 11% | 13% | 11% (−17 to 33) | Not significant | |
| Vertebral | 5.2% | 5.3% | 2% (−52 to 36) | Not significant | |
| Compliant | Any | 10% | 15% | 32% (3 to 53) | 156 (95 to 1810) |
| Appendicular | 9.3% | 14% | 33% (3 to 55) | 151 (91 to 1796) | |
| Upper limb | 2.4% | 5.4% | 55% (8 to 79) | 91 (64 to 642) | |
| RRI (CI) | NNH | ||||
| Vertebral | 2.1% | 2.0% | 10% (−58 to 179) | Not significant | |