TY - JOUR
T1 - Association of mammographic density measures and breast cancer “intrinsic” molecular subtypes
AU - Kleinstern, Geffen
AU - Scott, Christopher G.
AU - Tamimi, Rulla M.
AU - Jensen, Matthew R.
AU - Pankratz, V. Shane
AU - Bertrand, Kimberly A.
AU - Norman, Aaron D.
AU - Visscher, Daniel W.
AU - Couch, Fergus J.
AU - Brandt, Kathleen
AU - Shepherd, John
AU - Wu, Fang Fang
AU - Chen, Yunn Yi
AU - Cummings, Steven R.
AU - Winham, Stacey
AU - Kerlikowske, Karla
AU - Vachon, Celine M.
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
PY - 2021/5
Y1 - 2021/5
N2 - Purpose: We evaluated the association of percent mammographic density (PMD), absolute dense area (DA), and non-dense area (NDA) with risk of “intrinsic” molecular breast cancer (BC) subtypes. Methods: We pooled 3492 invasive BC and 10,148 controls across six studies with density measures from prediagnostic, digitized film-screen mammograms. We classified BC tumors into subtypes [63% Luminal A, 21% Luminal B, 5% HER2 expressing, and 11% as triple negative (TN)] using information on estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and tumor grade. We used polytomous logistic regression to calculate odds ratio (OR) and 95% confidence intervals (CI) for density measures (per SD) across the subtypes compared to controls, adjusting for age, body mass index and study, and examined differences by age group. Results: All density measures were similarly associated with BC risk across subtypes. Significant interaction of PMD by age (P = 0.001) was observed for Luminal A tumors, with stronger effect sizes seen for younger women < 45 years (OR = 1.69 per SD PMD) relative to women of older ages (OR = 1.53, ages 65–74, OR = 1.44 ages 75 +). Similar but opposite trends were seen for NDA by age for risk of Luminal A: risk for women: < 45 years (OR = 0.71 per SD NDA) was lower than older women (OR = 0.83 and OR = 0.84 for ages 65–74 and 75 + , respectively) (P < 0.001). Although not significant, similar patterns of associations were seen by age for TN cancers. Conclusions: Mammographic density measures were associated with risk of all “intrinsic” molecular subtypes. However, findings of significant interactions between age and density measures may have implications for subtype-specific risk models.
AB - Purpose: We evaluated the association of percent mammographic density (PMD), absolute dense area (DA), and non-dense area (NDA) with risk of “intrinsic” molecular breast cancer (BC) subtypes. Methods: We pooled 3492 invasive BC and 10,148 controls across six studies with density measures from prediagnostic, digitized film-screen mammograms. We classified BC tumors into subtypes [63% Luminal A, 21% Luminal B, 5% HER2 expressing, and 11% as triple negative (TN)] using information on estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2), and tumor grade. We used polytomous logistic regression to calculate odds ratio (OR) and 95% confidence intervals (CI) for density measures (per SD) across the subtypes compared to controls, adjusting for age, body mass index and study, and examined differences by age group. Results: All density measures were similarly associated with BC risk across subtypes. Significant interaction of PMD by age (P = 0.001) was observed for Luminal A tumors, with stronger effect sizes seen for younger women < 45 years (OR = 1.69 per SD PMD) relative to women of older ages (OR = 1.53, ages 65–74, OR = 1.44 ages 75 +). Similar but opposite trends were seen for NDA by age for risk of Luminal A: risk for women: < 45 years (OR = 0.71 per SD NDA) was lower than older women (OR = 0.83 and OR = 0.84 for ages 65–74 and 75 + , respectively) (P < 0.001). Although not significant, similar patterns of associations were seen by age for TN cancers. Conclusions: Mammographic density measures were associated with risk of all “intrinsic” molecular subtypes. However, findings of significant interactions between age and density measures may have implications for subtype-specific risk models.
KW - Breast cancer
KW - Mammographic density
KW - “Intrinsic” molecular subtypes
UR - http://www.scopus.com/inward/record.url?scp=85098575740&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85098575740&partnerID=8YFLogxK
U2 - 10.1007/s10549-020-06049-8
DO - 10.1007/s10549-020-06049-8
M3 - Article
C2 - 33392844
AN - SCOPUS:85098575740
SN - 0167-6806
VL - 187
SP - 215
EP - 224
JO - Breast Cancer Research and Treatment
JF - Breast Cancer Research and Treatment
IS - 1
ER -