Screening for abdominal aortic aneurysm (AAA) v no screening (control) in Danish men 64–73 years of age*
| Outcomes at mean 52 months | Screening | Control | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| Specific mortality caused by AAA | 0.14% | 0.43% | 67% (29 to 84) | 350 (203 to 994) |
| All cause mortality | 14.8% | 16.2% | 8% (0 to 15) | Not significant |
| Ruptured aneurysms | 0.13% | 0.46% | 73% (40 to 87) | 300 (184 to 652) |
| Emergency operations for AAA | 0.08% | 0.32% | 75% (34 to 91) | 420 (239 to 1103) |
| RRI (CI) | NNH (CI) | |||
|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, RRI, NNT, NNH, and CI calculated from data in article. | ||||
| Planned elective operations | 0.76% | 0.17% | 335% (126 to 736) | 172 (119 to 279) |
| All operations combined | 0.84% | 0.49% | 70% (9 to 165) | 290 (156 to 1578) |