Living in poverty drives colorectal cancer deaths—and three factors explain why.
People living in persistent poverty areas—where 20%+ have been poor for 30+ years—have higher colorectal cancer mortality. This large study of 5,028 Arkansas CRC patients linked registry, death certificate, and insurance claims data to identify what specifically drives this disparity.
Living in poverty drives colorectal cancer deaths—and three factors explain why.
People living in persistent poverty areas—where 20%+ have been poor for 30+ years—have higher colorectal cancer mortality. This large study of 5,028 Arkansas CRC patients linked registry, death certificate, and insurance claims data to identify what specifically drives this disparity.
Key mediators were: later stage at diagnosis (33.7% of the mortality difference), not receiving surgery (29.3%), and health insurance type (13.8%). The hazard ratio for death was 1.17 for patients in persistent poverty tracts compared to other areas.
The finding pinpoints actionable intervention targets—stage at diagnosis and surgical access—rather than leaving poverty as a general, unaddressable explanation.
Key Findings
- Persistent poverty associated with HR 1.17 for CRC mortality
- Stage at diagnosis mediated 33.7% of the poverty-mortality association
- Not receiving surgery mediated 29.3% of the association
- Health insurance type mediated 13.8% of the association
- 5,028 urban Arkansas CRC patients analyzed using linked registry and claims data
Implications
Targeted interventions—improving early detection in poverty areas, ensuring surgical access, and expanding insurance coverage—could reduce poverty-related CRC mortality disparities. These are modifiable factors, not fixed characteristics of disadvantaged populations.
Caveats
Retrospective Arkansas-specific study; abstract-only. Urban census tracts only. Findings may not generalize beyond Arkansas or urban settings. Residual confounding possible. Mediation analysis makes causal assumptions.
Source: JAMA network open — 2026-04-01
