Rural Patients Face Higher Risk of Late-Stage Breast Cancer, Especially When Uninsured

Patients with breast cancer in rural areas of the US are significantly more likely to be diagnosed at advanced stages, with race, insurance status, and geographic region all independently contributing to that risk, according to a new study.¹

The analysis showed that Black, Hispanic, and uninsured patients were more likely to receive advanced stage III or IV breast cancer diagnoses. Additionally, geographical differences existed, with patients in East South Central and West South Central having a significantly higher likelihood of stage IV breast cancer.

The study, published in the Journal of the American College of Surgeons, drew on the National Cancer Database (NCDB) to examine 52,287 rural breast cancer patients diagnosed between 2004 and 2021. Using multinomial logistic regression, the team evaluated which clinical and demographic factors were most strongly associated with presenting at stage II, III, or IV and used stage I diagnosis as the reference point. Covariates included race, Hispanic ethnicity, insurance status, area-level median income, educational attainment, geographic region, and type of treating facility.

Overall, 13.6% of rural patients were diagnosed at an advanced stage (stage III or IV), compared with 12.1% in the non-rural NCDB cohort, which is a statistically significant difference. But even within the rural population, certain groups fared worse. Non-Hispanic Black patients had meaningfully higher odds of later-stage diagnosis at every stage compared with non-Hispanic white patients (OR stage III, 1.58; OR stage IV, 1.29). Hispanic patients had elevated odds of presenting at stage III (OR = 1.5). Uninsured patients showed progressively escalating risk as stage advanced when compared with privately insured patients. For example, the stage II OR was 1.37 compared with the stage 3 OR of 2.06. By stage IV, their odds were nearly 4 times higher (OR, 3.89). Even Medicaid-insured patients faced a substantially higher risk of advanced-stage diagnosis compared to privately insured patients, though Medicaid did provide a protective benefit compared to being uninsured entirely.

The researchers also found geographic differences. Compared to patients in the West North Central region, those in the East South Central and West South Central regions, which includes states like Alabama, Mississippi, Louisiana, Oklahoma, and Texas, had significantly higher odds of presenting with stage IV disease. Patients treated in New England, by contrast, had meaningfully lower odds of late-stage diagnosis.

These findings align with existing evidence that rural health care access is uneven. As the authors write, these disparities that exist in rural breast cancer screening and treatment "are likely to be further exacerbated by geographic location." The oncology workforce gap tells a similar story, as data from a report from the American Society Clinical Oncology showed that only 4% of medical and hematology oncologists work in the counties where cancer mortality is highest, which is precisely where they are needed most.²

The authors concluded that further exploration of contributing factors "will be instrumental to guiding healthcare policy and programming to ensure equitable care for rural breast cancer patients."

References

1. Sogade OO, Margenthaler JA. Evaluating factors associated with advanced-stage breast cancer presentation in rural patients in the National Cancer Database. J Am Coll Surg. Published online March 11, 2026. doi:10.1097/XCS.0000000000001759

2. Kirkwood MK, et al. Where have we been and where are we going? The state of the hematology and medical oncologist workforce in America. JCO Oncol Pract. 2025;21:1775-1785. doi:10.1200/OP-25-00144