Clinical Report: Barriers to Cancer Screening Access in a Diverse US Cohort

Overview

This study analyzed data from the NIH All of Us Research Program to identify barriers to cancer screening for breast, cervical, colorectal, lung, and prostate cancers. It found that multiple individual and systemic obstacles, including financial constraints and logistical challenges, contribute to underuse of recommended screening services despite established guidelines.

Background

Routine cancer screening per USPSTF guidelines significantly reduces morbidity and mortality by detecting cancers at treatable stages. However, disparities in screening rates persist across demographic and socioeconomic groups, with millions lacking insurance and many individuals not undergoing recommended screenings. Understanding barriers to screening is critical to improving preventive care and reducing cancer-related deaths.

Data Highlights

The NIH All of Us cohort includes 633,540 participants with diverse representation, providing longitudinal EHR and self-reported data. Approximately 48% completed a healthcare access survey assessing nine potential barriers to care. Screening adherence was evaluated using USPSTF guidelines for five common cancers, with eligibility based on age and EHR follow-up duration. Prior studies report 21.2% to 28.7% of women missed routine breast, cervical, and colorectal cancer screenings, while 65% to 83% of individuals missed prostate and lung cancer screenings.

Key Findings

• Significant disparities exist in cancer screening adherence across demographic and socioeconomic groups despite USPSTF recommendations.
• Common barriers to accessing care include transportation difficulties, rural residence, nervousness about healthcare visits, inability to get time off work or childcare, caregiving responsibilities, and financial constraints such as high copays and deductibles.
• Financial barriers, including inability to afford copays or deductibles and out-of-pocket costs, are strongly associated with lower screening participation.
• Exploratory factor analysis identified correlated clusters of barriers that broadly impact preventive care utilization.
• The NIH All of Us cohort provides a large, diverse dataset enabling comprehensive assessment of obstacles affecting cancer screening uptake.
• Screening adherence was ascertained objectively via EHR data linked to participant surveys, enhancing validity of findings.

Clinical Implications

Clinicians should consider multifactorial barriers when counseling patients about cancer screening, including financial, logistical, and psychosocial factors. Tailored interventions addressing these obstacles may improve screening rates, especially in underserved populations. Public health initiatives should focus on reducing systemic barriers to enhance equitable access to preventive cancer services.

Conclusion

Despite clear guidelines and known benefits, substantial obstacles limit cancer screening uptake in diverse US populations. Comprehensive understanding of these barriers can inform targeted strategies to improve early detection and reduce cancer morbidity and mortality.

References

1. USPSTF Guidelines 2023 -- Cancer Screening Recommendations
2. NIH All of Us Research Program -- Cohort Data and Methodology
3. Cancer Screening Disparities Studies -- Prior Research References