Silver alloy or silver oxide catheters v standard catheters (SCs) on risk of bacteriuria in adults who are admitted to hospital and having short term urinary catheterisation*

OutcomesComparisonsWeighted event ratesRRR (95% CI)NNT (CI)
Silver alloy or silveroxide cathetersSCs
*Abbreviations defined in glossary; weighted event rates, RRR, NNT, and CI calculated from data in article using a fixed effects model.
Asymptomatic bacteriuriaSilver alloy v SCs at <1 wk10%28%64% (48 to 76)6 (5 to 9)
Silver alloy v SCs at >1 wk24%36%33% (10 to 50)9 (5 to 25)
Silver oxide v SCs12%13%11% (−15 to 32)Not significant
Symptomatic bacteriuriaSilver alloy v SCs17%28%40% (27 to 50)10 (7 to 15)