Subglottic secretion drainage (SSD) v no SSD to prevent ventilator associated pneumonia*

Weighted event rates
OutcomesNumber of trials (n)SSDNo SSDRRR (95% CI)NNT (CI)
*Abbreviations defined in glossary. Weighted event rates, RRR, RRI, NNT, NNH, and CI calculated from data in article using a fixed effects model. Follow up was to discharge or death.
Ventilator associated pneumonia5 (896)12%19%49% (29 to 63)14 (9 to 31)
RRI (CI)NNH
Mortality4 (823)16.5%16.3%7% (−19 to 42)Not significant