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20 April 1999 | Volume 130 Issue 8 | Pages 637-642
Background: A family history of abdominal aortic aneurysm has been reported to increase the risk for developing the disease.
Objective: To determine the risk for abdominal aortic aneurysm in first-degree relatives of patients with the disease.
Design: Cross-sectional ultrasonographic screening study.
Setting: University Central Hospital, Helsinki, Finland.
Patients: 238 of 325 living first-degree relatives of patients having surgery for abdominal aortic aneurysm (age > 50 years; 98 men and 110 women) and 281 controls (135 men and 149 women) without a family history of abdominal aortic aneurysm.
Measurements: Ultrasonography was used to measure aortic diameter in 101 male relatives and 140 female relatives (241 of the 325 persons at risk [74%]) and in 281 controls.
Results: Three siblings had already undergone surgery for abdominal aortic aneurysm. Eleven siblings (all brothers) (11 of 101 [10.9%]) had ultrasonographic evidence of abdominal aortic aneurysm (aortic diameter > 30 mm). In the control group, 2 men (1.5%) and 2 women (1.3%) had an aneurysm. Thirty siblings and no controls had dilatation of the abdominal aorta (aortic diameter, 20 to 29 mm). Neither the age nor the sex of the proband affected risk for developing abdominal aortic aneurysm among first-degree relatives. Family history increased the risk for an aneurysm by 4.33-fold (95% CI, 1.32-fold to 14.23-fold), male sex increased the risk by 12.21-fold (CI, 2.63-fold to 56.64-fold), and age (by decade) increased the risk by 1.93-fold (CI, 1.15-fold to 3.25-fold).
Conclusion: Aging brothers of patients with known abdominal aortic aneurysm have the highest risk for developing the disease; the prevalence of the disease in siblings older than 60 years of age is 18%.
Author and Article Information
From Helsinki University Central Hospital, Helsinki, Finland.
Acknowledgment: The authors thank Yvonne Sundström for skillful assistance.
Grant Support: By the Research Fund of Helsinki University Central Hospital, the Finnish Society of Angiology, Ciba-Geigy Oy, Roche Oy, Braun Finland Oy, and Boehringer Ingelheim Oy.
Requests for Reprints: Jarmo A. Salo, MD, Department of Thoracic and Cardiovascular Surgery, Helsinki University Central Hospital, Haartmaninkatu 4, FIN-00290 Helsinki, Finland.
Current Author Addresses: Drs. Salo, Soisalon-Soininen, and Mattila: Department of Thoracic and Cardiovascular Surgery, Helsinki University Central Hospital, Haartmaninkatu 4, FIN-00290 Helsinki, Finland.
Dr. Bondestam: Department of Diagnostic Radiology of Helsinki University, Helsinki University Central Hospital, Haartmaninkatu 4, FIN-00290 Helsinki, Finland. ARTICLE
Familial Occurrence of Abdominal Aortic Aneurysm
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