Objective: An ultrasound screening program for abdominal aortic aneurysms (AAAs) in men began in Gloucestershire in 1990 and has been running for 20 years. This report examines the workload and results.
Methods: We reviewed the screening database for attendance and outcome records from AAA surgery in Gloucestershire and postmortem and death certificate results looking for men who died from ruptured AAAs in the screening cohort. The setting was an AAA screening program in the county of Gloucestershire, UK. Men aged 65 were invited by year of birth to attend for an ultrasound screening for AAAs. Men with an aorta <2.6 cm were reassured and discharged; men with an aorta between 2.6 cm and 5.4 cm were offered follow-up surveillance; men with an aorta >5.4 cm were considered for intervention. We analyzed attendance rates, screening and surveillance outcomes, and intervention rates and outcomes over the 20 years of the study.
Results: Some 61,982 men were invited, and 52,690 attended for screening (85% attendance). At first scan, 50,130 men (95.14%) had an aortic diameter <2.6 cm in diameter and were reassured and discharged; 148 men (0.28%) had an AAA >5.4 cm in diameter and were referred for possible treatment; 2412 (4.57%) had an aortic diameter between 2.6 and 5.4 cm and entered a program of ultrasound surveillance. The overall mean aortic diameter on initial scan fell from 2.1 cm to 1.7 cm during the study (reduction 0.015 cm/y, 95% confidence interval [CI], 0.0144-0.0156 cm/y; P < .0001). Some 631 patients with AAAs had intervention treatment with a perioperative mortality rate of 3.9%; during the same interval, 372 AAAs detected incidentally were treated, with a mortality rate of 6.7%. The number of ruptured AAAs treated annually in Gloucestershire fell during the study (χ(2) for trend = 18.31, df = 1; P < .0001).
Conclusions: Screening reduced the number of ruptured AAAs in Gloucestershire during the 20 years of the program. There has been a significant reduction of men with an abnormal aorta, as the mean aortic diameter of the 65-year-old male has reduced over 20 years.
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