Endometriosis and mammographic density measurements in the Nurses' Health Study II. Academic Article uri icon

Overview

abstract

  • PURPOSE: Endometriosis and mammographic density have been hypothesized to be influenced by sex steroid hormonal exposures in adolescence and early adulthood. We investigated the association between endometriosis and mammographic density, a consistent and independent risk factor for breast cancer. METHODS: We conducted a cross-sectional analysis among 1,581 pre- and postmenopausal women not previously diagnosed with breast cancer in the Nurses' Health Study II cohort. We measured average percent mammographic density and absolute dense and non-dense breast area using a validated computer-assisted method. Multivariable linear regression was used to estimate the association between endometriosis and mammographic density among pre- and postmenopausal women separately. RESULTS: Among premenopausal women, average percent mammographic density was 43.1 % among women with endometriosis (n = 91) and 40.5 % among women without endometriosis (n = 1,150). Endometriosis was not associated significantly with mammographic density among premenopausal (% difference = 2.00 percentage points 95 % CI -1.33, 5.33) or among postmenopausal women (% difference = -0.89 percentage points 95 % CI -5.10, 3.33). Among premenopausal women, there was heterogeneity by BMI at age 18 (p value = 0.003), with a suggested association among those who were lean at age 18 (BMI < 20.6 kg/m(2)) (% difference = 3.74 percentage points 95 % CI -0.29, 7.78). CONCLUSION: Endometriosis was not found to be associated with overall measurements of mammographic density.

publication date

  • August 22, 2016

Research

keywords

  • Breast Density
  • Endometriosis

Identity

PubMed Central ID

  • PMC5048469

Scopus Document Identifier

  • 84983542627

Digital Object Identifier (DOI)

  • 10.1007/s10552-016-0801-y

PubMed ID

  • 27549771

Additional Document Info

volume

  • 27

issue

  • 10