Local warming (LW), systemic warming (SW), and LW or SW v standard preoperative care (SPC) for reducing wound infection after clean surgery†

Outcomes at 6 weeksComparisonEvent ratesRRR (95% CI)NNT (CI)
Wound infectionLW v SPC4% v 14%73% (34 to 90)10 (6 to 28)
SW v SPC6% v 14%58% (9 to 81)13 (7 to 101)
LW or SW v SPC5% v 14%66% (33 to 82)12 (7 to 30)
Prescribed postoperative antibioticsLW v SPC7% v 16%59% (16 to 80)11 (6 to 52)
SW v SPC6% v 16%59% (16 to 80)11 (6 to 50)
LW or SW v SPC6% v 16%59% (26 to 77)11 (6 to 32)
RBI (95% CI)
†Abbreviations defined in glossary; RRR, RBI, NNT, and CI calculated from data in article.
ASEPSIS score 0–10LW v SPC94% v 83%14% (5 to 25)9 (6 to 25)
SW v SPC93% v 83%12% (3 to 24)10 (6 to 41)
LW or SW v SPC94% v 83%13% (5 to 24)10 (6 to 23)