Source:Cancer Epidemiology, Volume 51
Author(s): Ashley S. Felix, Amy Lehman, Randi E. Foraker, Michelle J. Naughton, Julie K. Bower, Lewis Kuller, Gloria E. Sarto, Marcia L. Stefanick, Linda Van Horn, Rebecca D. Jackson, Electra D. Paskett
BackgroundThe majority of women diagnosed with endometrial cancer (EC) have low cancer-specific mortality; however, a high prevalence of cardiovascular disease (CVD) risk factors places EC patients at high risk of developing CVD. In the Women's Health Initiative (WHI), we assessed the hypothesis that CVD risk was higher among women who developed EC compared with women who did not develop EC.MethodsWe compared the incidence of fatal and non-fatal CVD events among 1,179 women who developed Type I EC, 211 women who developed Type II EC, and 92,217 women who did not develop EC. We first estimated univariable cause-specific hazard ratios (CHRs) and 95% confidence intervals (CIs) for the association between an EC diagnosis (overall and by EC type) with CVD risk using Cox proportional hazards regression. Potential confounders were examined using a risk factor modeling approach; final multivariable-adjusted models included covariates that changed univariable CHRs for EC diagnosis by≥5%.ResultsIn multivariable-adjusted models, CVD risk did not significantly differ between women who developed EC compared to women who did not develop EC (CHR=1.01, 95% CI=0.87–1.16), particularly for the subgroup of women who developed Type I EC (CHR=0.98, 95% CI=0.84–1.14); however, there was a positive but statistically nonsignificant association for Type II EC (CHR=1.32, 95% CI=0.88–1.97).ConclusionDespite our null findings, women with EC should still receive counseling and support to make lifestyle changes aimed at reducing weight as appropriate, given the high prevalence of CVD risk factors at diagnosis.
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