Lumbee Native American ancestry and the incidence of aggressive histologic subtypes of endometrial cancer.

Published online

Journal Article

OBJECTIVE: The Lumbee Indian tribe is the largest Native American tribe in North Carolina, with about 55,000 enrolled members who mostly reside in southeastern counties. We evaluated whether Lumbee heritage is associated with high-risk histologic subtypes of endometrial cancer. METHODS: We retrospectively analyzed the available records from IRB-approved endometrial cancer databases at two institutions of patients of Lumbee descent (year of diagnosis range 1980-2014). Each Lumbee case was matched by age, year of diagnosis, and BMI to two non-Lumbee controls. Chi-square test was used to compare categorical associations. Kaplan-Meier methods and log-rank test were used to display and compare disease-free survival (DFS) and overall survival (OS). Multivariate Cox proportional hazards regression was used to adjust for age and BMI while testing cohort as a predictor of DFS and OS. RESULTS: Among 108 subjects, 10/35 (29%) Lumbee and 19/72 (26%) non-Lumbee subjects had high-risk (serous/clear cell/carcinosarcoma) histologic types (p = 0.8). 12/35 (34%) Lumbee and 24/72 (33%) non-Lumbee subjects had grade 3 tumors (p = 0.9). 5/33 (15%) Lumbee and 13/72 (18%) non-Lumbee had advanced stage endometrial cancer at diagnosis (p = 0.7). Lumbee ancestry was not associated with worse survival outcomes. OS (p = 0.054) and DFS (p = 0.01) were both worse in Blacks compared to Lumbee and White subjects. CONCLUSION: In this retrospective cohort analysis, Lumbee Native American ancestry was not a significant independent predictor of rates of high-risk histological subtypes of endometrial cancer or poor survival outcomes.

Full Text

Duke Authors

Cited Authors

  • Zhang, C; Roque, D; Ehrisman, JA; DiSanto, N; Broadwater, G; Doll, KM; Gehrig, PA; Secord, AA; Havrilesky, LJ

Published Date

  • August 2015

Published In

Volume / Issue

  • 13 /

Start / End Page

  • 49 - 52

PubMed ID

  • 26425722

Pubmed Central ID

  • 26425722

International Standard Serial Number (ISSN)

  • 2352-5789

Digital Object Identifier (DOI)

  • 10.1016/j.gore.2015.06.004


  • eng

Conference Location

  • Netherlands