Key result
Ultrasonographic screening of 1,748 men aged 65 years revealed a mean aortic diameter of 2.1 cm, with 1.5% having a diameter >4.0 cm and 97.5% having a diameter ≤3.3 cm.
Why the study?
What is the distribution of aortic diameter in 65-year-old men undergoing ultrasonographic screening?
Cross-Sectional (n=1,748)
What is the distribution of aortic diameter in 65-year-old men undergoing ultrasonographic screening?
In a screened population of 65-year-old men, 97.5% have an aortic diameter ≤3.3 cm, suggesting that a diameter >3.3 cm defines an aortic aneurysm in this demographic.
Answers are grounded in this paper and cite their sources.
May support redefining aneurysm threshold at >3.3 cm in screened 65-year-old men; leaves open prospective validation before practice change.
Between September 1990 and August 1991, 2291 men aged 65 years were invited for ultrasonographic screening of the aorta in the Gloucestershire aneurysm screening programme; 1748 (76.3 per cent) attended. An aortic diameter less than or equal to 2.5 cm was found in 1547 (88.5 per cent); 174 (10.0 per cent) had diameters in the range 2.6-4.0 cm, and 26 (1.5 per cent) had diameters greater than 4.0 cm. The mean(s.d.) aortic diameter was 2.1(0.55) cm and 97.5 per cent of patients had a diameter less than or equal to 3.3 cm. Any man over the age of 65 years with an aortic diameter greater than 3.3 cm has an aortic aneurysm.
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Lucarotti et al. (1992) conducted a cross-sectional in Aortic aneurysm (n=1,748). Ultrasonographic screening of the aorta was evaluated on Aortic diameter. Ultrasonographic screening of 1,748 men aged 65 years revealed a mean aortic diameter of 2.1 cm, with 1.5% having a diameter >4.0 cm and 97.5% having a diameter ≤3.3 cm.
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