Abstract
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. We retrospectively investigated the clinical data of 319 patients with AAAs who were followed up as outpatients for >2years after their initial visit and who underwent computed tomography >4 times. The mean follow-up period was 3.7±1.5years. The annual average growth rates according to varying ADs were as follows: 1.9±0.8 (AD 30-34mm), 2.6±1.2 (AD 35-39mm), 2.8±1.1 (AD 40-44mm), 3.1±1.3 (AD 45-49mm), 3.4±1.6 (AD 50-54mm), and 3.5±1.4mm (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 ≥3mm were extracted, and a statistically significant difference between smoking status and ADs of ≥40mm was observed. 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 ≥40mm.
Published Version
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