How does the incidence of abdominal aortic aneurysm (AAA) vary between males and females and among races?

Updated: Jan 08, 2019
  • Author: Saum A Rahimi, MD, FACS; Chief Editor: Vincent Lopez Rowe, MD  more...
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The incidence of AAA begins to increase sharply after 50 years of age and peaks in the eighth decade of life (see the image below). In women, the onset is delayed and appears to begin at approximately age 60 years.

Age is risk factor for development of aneurysm. Age is risk factor for development of aneurysm.

The male-to-female incidence ratio in people younger than 80 years is 2:1. In those older than 80 years, the ratio is 1:1. White men have the highest incidence of AAA (~3.5 times that in African American men). AAAs are uncommon in African Americans, Asians, and persons of Hispanic heritage.

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