Supplementation with calcium or ispaghula husk (fibre) v placebo for preventing recurrent adenomas ‡

Outcome at 3 yearsComparisonEvent ratesRRI (95% CI)NNH (CI)
‡Abbreviations defined in glossary; RRI, RRR, NNH, NNT, and CI calculated from data in article.
Recurrent adenomasFibre v placebo29% v 20%45% (1 to 109)12 (6 to 340)
Calcium v placebo16% v 20%21% (−23 to 50)Not significant