Supplementation with calcium or ispaghula husk (fibre) v placebo for preventing recurrent adenomas ‡
| Outcome at 3 years | Comparison | Event rates | RRI (95% CI) | NNH (CI) |
|---|---|---|---|---|
| ‡Abbreviations defined in glossary; RRI, RRR, NNH, NNT, and CI calculated from data in article. | ||||
| Recurrent adenomas | Fibre v placebo | 29% v 20% | 45% (1 to 109) | 12 (6 to 340) |
| RRR (CI) | NNT | |||
| Calcium v placebo | 16% v 20% | 21% (−23 to 50) | Not significant | |