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- Title
Investigation of Mammographie Breast Density as a Risk Factor for Ovarian Cancer.
- Authors
Wernli, Karen J.; O'Meara, Ellen S.; Kerlikowske, Karla; Miglioretti, Diana L.; Muller, Carolyn Y.; Onega, Tracy; Sprague, Brian L.; Henderson, Louise M.; Buist, Diana S. M.
- Abstract
Background Endogenous hormones and growth factors that increase mammographie breast density could increase ovarian cancer risk. We examined whether high breast density is associated with ovarian cancer risk. Methods We conducted a cohort study of 724603 women aged 40 to 79 years with 2 506732 mammograms participating in the Breast Cancer Surveillance Consortium from 1995 to 2009. Incident epithelial ovarian cancer was diagnosed in 1373 women. We used partly conditional Cox regression to estimate the association between breast density and 5-year risk of incident epithelial ovarian cancer overall and stratified by 10-year age group. All statistical tests were two-sided. Results Compared with women with scattered fibroglandular densities, women with heterogeneously dense and extremely dense breast tissue had 20% and 18% increased 5-year risk of incident epithelial ovarian cancer (hazard ratio [HR] = 1.20, 95% confidence interval [CI] = 1.06 to 1.36; HR = 1.18, 95% CI = 0.93 to 1.50, respectively; Ptrend = -01). Among women aged 50 to 59 years, we observed a trend in elevated risk associated with increased breast density (Ptrend = .02); women with heterogeneously and extremely dense breast tissue had 30% (HR = 1.30; 95% CI = 1.03 to 1.64) and 65% (HR = 1.65; 95% CI = 1.12 to 2.44) increased risk, respectively, compared with women with scattered fibroglandular densities.The pattern was similar but not statistically significant at age 40 to 49 years.There were no consistent patterns of breast density and ovarian cancer risk at age 60 to 79 years. Conclusions Dense breast tissue was associated with a modest increase in 5-year ovarian cancer risk in women aged 50 to 59 years but was not associated with ovarian cancer at ages 40 to 49 or 60 to 79 years.
- Subjects
MAMMOGRAMS; BREAST cancer research; OVARIAN cancer; CANCER in women; CANCER research
- Publication
JNCI: Journal of the National Cancer Institute, 2014, Vol 106, Issue 1, p1
- ISSN
0027-8874
- Publication type
Article
- DOI
10.1093/jnci/djt341