Abstract

e15520 Background: Colorectal cancer (CRC) is a significant public health concern, with disparities based on race, gender, and socioeconomic status increasingly recognized. The incidence of early-onset CRC (EOCRC) is rising, highlighting the need for detailed examination of disparities in EOCRC compared to late-onset CRC (LOCRC). This study utilizes the NIH All of Us database to explore these disparities. Methods: We conducted a cross-sectional analysis of 266,520 participants from the NIH All of Us Registered Tier Dataset v7. CRC cases were identified based on at least two recorded diagnoses in electronic health records. Participants were categorized into EOCRC if diagnosed before age 50 and LOCRC if diagnosed at age 50 or above. We compared demographic and socioeconomic variables, including gender, race/ethnicity, income, education, and smoking status, between the groups, using questionnaire responses. Statistical analyses were performed using R. Results: The average age at diagnosis was 42.1 years for EOCRC patients and 63.7 years for LOCRC patients. The EOCRC group had a higher proportion of females (57.8%) compared to the LOCRC group (49.2%, p = 0.006). Whites constituted the majority in both categories, but Hispanics were significantly more represented in the EOCRC group (21.1%) compared to the LOCRC group (11.1%, p < 0.001). Individuals with a higher income (more than $100,000 per year) were more prevalent in the EOCRC group (29.9%) than in the LOCRC group (17.7%, p < 0.001). There was no significant difference in education levels between the two groups (p = 0.52). A history of smoking 100 or more cigarettes was less common in EOCRC patients (32.8%) than LOCRC patients (48.1%, p < 0.001). Conclusions: This analysis highlights significant disparities in racial and gender representation as well as income level. Despite observed differences between the two groups, Hispanics, females, and higher income alone may not explain the only influencing factors as other cofounders, like insurance level, may have impacted the result. Cigarette exposure was more prevalent in the LOCRC group, which may represent a stronger environmental influence on CRC within this group. These findings highlight the need for further research to understand the underlying causes of these disparities and to develop targeted interventions. By addressing these disparities, we can move towards more equitable outcomes across all populations. [Table: see text]