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Updated: Feb 4, 2026

Porcine Model of Infrarenal Abdominal Aortic Aneurysm
Published on: November 21, 2019
Risk Factor Analyses of Abdominal Aortic Aneurysms Growth in Japanese Patients
Takeshi Baba1, Takao Ohki1, Yuji Kanaoka1
1Division of Vascular Surgery, Department of Surgery, Jikei University School of Medicine, Tokyo, Japan.
Background:
This study aimed to retrospectively demonstrate the growth rate (mm/year) of abdominal aortic aneurysm (AAA) diameters (ADs) and to analyze risk factors for AAA expansion.
Methods:
We retrospectively investigated the clinical data of 319 patients with AAAs who were followed up as outpatients for >2 years after their initial visit and who underwent computed tomography >4 times.
Results:
The mean follow-up period was 3.7 ± 1.5 years. The annual average growth rates according to varying ADs were as follows: 1.9 ± 0.8 (AD 30-34 mm), 2.6 ± 1.2 (AD 35-39 mm), 2.8 ± 1.1 (AD 40-44 mm), 3.1 ± 1.3 (AD 45-49 mm), 3.4 ± 1.6 (AD 50-54 mm), and 3.5 ± 1.4 mm (AD ≥55 mm). Factors associated with AAA expansion were smoking (P = 0.017), hypertension (P < 0.001), and ADs (P < 0.001). In the subgroup analysis, data regarding growth rates of ≥3 mm were extracted, and a statistically significant difference between smoking status and ADs of ≥40 mm was observed.
Conclusions:
Factors associated with AAA expansion in Japanese patients included smoking, hypertension, and ADs, and a statistically significant difference was observed between smoking status and ADs of ≥40 mm.
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