Trends in Acute Kidney Injury Related Deaths in the US from 1999 to 2020

Background Acute kidney injury requiring dialysis is linked to long-term care demands, higher hospital mortality, and increased healthcare expenses. We aim to assess nationwide trends and regional variations in acute kidney injury-related mortality in the US. Materials and Methods We used death certificates from the CDC WONDER database (1999-2020) to calculate age-adjusted mortality rates (AAMRs) and annual percent change (APC). The data were stratified by year, gender, race/ethnicity, and geographic region. Results From 1999 to 2020, there were a total of 4,599,652 deaths attributed to acute kidney injury. The AAMR for acute kidney injury-related deaths surged from 11.4 in 1999 to 20.1 in 2020. Men consistently exhibited higher AAMRs than women throughout the study period (overall AAMR in men: 20.1; women: 13.2). When examining average AAMRs by race/ethnicity, Black/African Americans recorded the highest rates at 21.9, followed by American Indian or Alaskan Native (16.4), Whites (15.6), Hispanics (14.5), and Asian/Pacific Islander (10.7). Significant regional disparities were observed, with the southern region reporting the highest AAMR (17.2) and non-metropolitan areas having higher AAMRs than metropolitan areas (18.3 vs. 15.6). States in the top 90 th percentile for acute kidney injury deaths included Indiana, Kentucky and South Carolina, which had nearly double the AAMR compared to states like New York, Utah, and Vermont. Conclusion In the last two decades, the United States has experienced a troubling increase in acute kidney injury-related deaths, emphasizing the urgent need for targeted and equitable healthcare interventions to address persistent disparities in gender, race, geography, and urbanization.