Mechanical ventilation with lower tidal volumes (LTV) v with traditional tidal volumes (TTV) in the acute respiratory distress syndrome*
| Outcomes at 28 days | LTV | TTV | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| Death | 31% | 40% | 22% (7 to 35) | 12 (7 to 41) |
| LTV | TTV | Mean difference (CI) | ||
|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| Ventilator free days | 12 | 10 | 2 (0.5 to 3.5) | |








