Impervious wound edge protector v no protector for wound infection rates at up to 30 days after abdominal surgery§

Wound statusImpervious wound edge protectorNo protectorRRR (95% CI)NNT (CI)
§Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article.
All wounds14%30%54%(30 to 71)7(4 to 13)
Clean contaminated wounds 7%13%45%(−16 to 74)Not significant
Contaminated wounds24%67%64%(33 to 81)3(2 to 6)
Dirty wounds75%94%21%(−9 to 57)Not significant