Figure 1.

Aneurysm deaths and aneurysm repairs for reference case and best alternative strategy

Data for reference case and best alternative strategy are shown. Reference case: invitation to screening at age 65 years, diagnosis threshold 3·0 cm; intervention threshold 5·5 cm. Best alternative strategy: invitation to screening at age 70 years, diagnosis threshold 2·5 cm, intervention threshold 5·0 cm. Differences in elective operations, emergency operations and AAA deaths in 1 million women (invited to screening minus not invited to screening group; A). Percentage reduction in number of AAA deaths from screening by age (B). Because of small number volatility, the percent reduction in AAA deaths is not shown when the number of AAA deaths is less than 50 (approximately the first year after invitation to screening). AAA=abdominal aortic aneurysm.