Mechanical ventilation with lower tidal volumes (LTV) v with traditional tidal volumes (TTV) in the acute respiratory distress syndrome*

Outcomes at 28 daysLTVTTVRRR (95% CI)NNT (CI)
Death31%40%22% (7 to 35)12 (7 to 41)
LTVTTVMean difference (CI)
*Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article.
Ventilator free days12102 (0.5 to 3.5)