A smoking cessation programme (SCP) plus inhaled ipratropium or inhaler placebo v usual care (UC) in current smokers with asymptomatic airway obstruction at 14.5 years*
| Outcome | Comparisons | Event rates | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| All cause mortality | SCP (with or without iprotropium) v UC | 11.8% v 13.7% | 14.5% (1.6 to 25.7) | 51 (26 to 487) |
| SCP plus ipratropium v UC | 11.5% v 13.7% | 16.2% (1.1 to 28.9) | 45 (24 to 695) | |
| SCP plus placebo v UC | 12.0% v 13.7% | 12.9% (−2.6 to 26.0) | Not significant | |
| SCP plus ipratropium v SCP plus placebo | 11.5% v 12.0% | 3.8% (−14.2 to 18.9) | Not significant | |