Abstract
Abstract Introduction: The number of lymph nodes examined during colon cancer surgery falls below nationally recommended guidelines in the general population, with blacks and Hispanics less likely to have adequate nodal evaluation in comparison to whites. The Department of Defense's (DoD's) Military Health System (MHS) provides equal access to medical care for its beneficiaries, regardless of racial/ethnic background. Thus, the MHS provided an excellent opportunity to investigate whether racial/ethnic differences exist in an equal access medical care system. Methods: Linked data from the DoD cancer registry and administrative claims databases were used and included 2,155 colon cancer cases. Multivariate logistic regression assessed the association between race/ethnicity and the number of lymph nodes examined (<12 and ≥ 12) overall and for stratified analyses. Results: No overall racial/ethnic difference in the number of lymph nodes examined was identified. Further stratified analyses yielded similar, except potential racial/ethnic differences were found among persons with poorly differentiated tumors, where non-Hispanic blacks (NHBs) tended to be less likely to have ≥12 lymph nodes dissected (OR = 0.31, 95% CI, 0.13-0.74) compared to non-Hispanic whites. Conclusion: Racial/ethnic disparities in the number of lymph nodes evaluated among patients with colon cancer were not apparent in an equal-access healthcare system. However, among poorly differentiated tumors, there might be racial/ethnic differences in nodal yield, suggesting the possible effects of factors other than access to healthcare. Citation Format: Abegail A. Gill, Lindsey Enewold, Shelia H. Zahm, Craig D. Shriver, Alexander Stojadinovic, Katherine A. McGlynn, Kangmin Zhu. Colon cancer lymph node evaluation among Military Health System beneficiaries: An analysis by race/ethnicity. [abstract]. In: Proceedings of the Twelfth Annual AACR International Conference on Frontiers in Cancer Prevention Research; 2013 Oct 27-30; National Harbor, MD. Philadelphia (PA): AACR; Can Prev Res 2013;6(11 Suppl): Abstract nr A64.
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