S653 Colorectal Cancer Burden From Metabolic and Dietary Risks in the United States Over 3 Decades

Introduction: Colorectal cancer (CRC) remains a major contributor to cancer-related morbidity and mortality in the United States. A significant portion of this burden is attributable to modifiable risk factors, and obtaining insight into long-term trends and geographic variation in CRC burden attributable to these factors is essential to ascertain effective prevention strategies. Methods: We analyzed data from the Global Burden of Disease (GBD) study to estimate the burden of CRC attributable to elevated body mass index (BMI), high fasting plasma glucose, and dietary risks in the United States from 1990 to 2021. Age-standardized disability-adjusted life years (DALYs) and deaths were extracted for each risk factor. Temporal trends were assessed by sex and year using line graphs, while geographic variation was visualized with state-level choropleth maps. All analyses were completed using R software version 4.3.2. Results: In 1990, colorectal cancer attributable to dietary risks accounted for 26,740 deaths, increasing to 30,257 in 2021 (+13.2%). Deaths due to high fasting plasma glucose rose from 4,826 to 8,793 (+82.2%), while those from high BMI increased from 7,377 to 11,402 (+54.6%). Over the same period, the age-standardized DALY rate declined by 31.5% for dietary risks and 8.2% for high BMI but rose by 2.8% for high fasting plasma glucose. In 2021, the highest BMI-attributable CRC DALY rate was observed in Mississippi (81.7 per 100,000; 95% CI: 35.6–129.2) and the lowest in Colorado (36.3 per 100,000; 95% CI: 15.2–59.1). The highest BMI-attributable CRC death rate was also in Mississippi (3.0 per 100,000; 95% CI: 1.3–4.8), and the lowest in Colorado (1.5 per 100,000; 95% CI: 0.6–2.4). Conclusion: Although the age-standardized DALY rates attributable to dietary and metabolic risks have declined over the past 3 decades, the absolute burden of CRC linked to these modifiable factors remains substantial. Given the modifiable nature of these exposures, targeted public health interventions are needed to curb preventable CRC mortality and morbidity in the United States.