Abstract Body (Do not enter title and authors here): Background
Aortic dissection (AD) and aneurysm (AA) have a low incidence but are severe health risks associated with high mortality rates, and based on location, can have a mortality rate of over 80%. We aim to highlight disparities in mortality based on gender, race, age and demographic background.
Methods
This retrospective study analyzed death certificate data for AD and AA (ICD-10 code I71) from 1999 to 2020 using the CDC WONDER database. Age-adjusted mortality rates (AAMR) per 100,000 were assessed for adults aged 25 and older by gender, race, year, state, and place of death, while crude mortality rates (CMR) per 100,000 were used for age groups. Joinpoint regression calculated the annual percent change (APC) and average annual percent change (AAPC) with 95% confidence intervals.
Results
From 1999 to 2020, AD and AA resulted in 400,748 deaths in the US. During this period, AAMR for men (12.19) was approximately double that for women (5.77). Overall, the AAMR decreased from 12.40 to 6.71 (AAPC: -2.93; 95% CI: -3.06 to -2.79; p-value<0.000001). NH whites had the highest AAMR at 8.93, while Hispanic and Latino populations had the lowest at 4.20. Approximately 52.3% of the deaths occurred in inpatient medical facilities, whereas 18.4% occurred at home. Vermont, West Virginia, and Wyoming had the highest AAMRs, at 11.60, 11.47, and 11.30, respectively.
Among racial groups, both males and females experienced a decrease in AAMR except for NH black men. For this group, there was an increase in AAMR from 9.42 in 2012 to 10.43 in 2020 (APC:1.03; 95% CI: 0.15 to 2.22; p-value:0.028).
The CMR for young adults rose significantly from 0.62 in 2014 to 0.73 in 2020 (APC:2.55; 95% CI 1.11 to 6.74; p-value:0.02), and for middle-aged adults from 3.09 in 2010 to 3.61 in 2020 (APC: 1.57; 95% CI 1.04 to 2.25; p-value<0.000001). Conversely, a steep decline in CMR was observed for older adults from 27.93 in 2014 to 25.4 in 2020 (APC:-1.34; 95% CI -1.9 to -0.69; p-value:0.0004).

Conclusion
Although AD and AA mortality rates have declined over time, significant disparities persist for NH Black men and young/middle-aged adults. This highlights the need for early screening programs and equitable healthcare provision for all populations.