Invited v not invited for abdominal aortic aneurysm (AAA) screening at mean 4.1 years†
| Outcomes | Invited | Not invited | RRR (95% CI) | NNS (CI) |
|---|---|---|---|---|
| †NNS = number needed to screen. Other abbreviations defined in glossary; RRR, NNS, and CI calculated from data in article. | ||||
| Death from AAA | 0.19% | 0.33% | 42% (22 to 58) | 712 (500 to 1000) |
| Nonfatal ruptured AAA plus AAA related deaths | 0.24% | 0.41% | 41% (23 to 55) | 589 (334 to 1000) |