Hair product use, age at menarche and mammographic breast density in multiethnic urban women

DSpace/Manakin Repository

Hair product use, age at menarche and mammographic breast density in multiethnic urban women

Citable link to this page

 

 
Title: Hair product use, age at menarche and mammographic breast density in multiethnic urban women
Author: McDonald, Jasmine A.; Tehranifar, Parisa; Flom, Julie D.; Terry, Mary Beth; James-Todd, Tamarra

Note: Order does not necessarily reflect citation order of authors.

Citation: McDonald, Jasmine A., Parisa Tehranifar, Julie D. Flom, Mary Beth Terry, and Tamarra James-Todd. 2018. “Hair product use, age at menarche and mammographic breast density in multiethnic urban women.” Environmental Health 17 (1): 1. doi:10.1186/s12940-017-0345-y. http://dx.doi.org/10.1186/s12940-017-0345-y.
Full Text & Related Files:
Abstract: Background: Select hair products contain endocrine disrupting chemicals (EDCs) that may affect breast cancer risk. We hypothesize that, if EDCs are related to breast cancer risk, then they may also affect two important breast cancer risk factors: age at menarche and mammographic breast density. Methods: In two urban female cohorts (N = 248): 1) the New York site of the National Collaborative Perinatal Project and 2) the New York City Multiethnic Breast Cancer Project, we measured childhood and adult use of hair oils, lotions, leave-in conditioners, root stimulators, perms/relaxers, and hair dyes using the same validated questionnaire. We used multivariable relative risk regression models to examine the association between childhood hair product use and early age at menarche (defined as <11 years of age) and multivariable linear regression models to examine the association between childhood and adult hair product use and adult mammographic breast density. Results: Early menarche was associated with ever use of childhood hair products (RR 2.3, 95% CI 1.1, 4.8) and hair oil use (RR 2.5, 95% CI 1.2, 5.2); however, additional adjustment for race/ethnicity, attenuated associations (hair products RR 1.8, 95% CI 0.8, 4.1; hair oil use RR 2.3, 95% CI 1.0, 5.5). Breast density was not associated with adult or childhood hair product or hair oil use. Conclusions: If confirmed in larger prospective studies, these data suggest that exposure to EDCs through hair products in early life may affect breast cancer risk by altering timing of menarche, and may operate through a mechanism distinct from breast density.
Published Version: doi:10.1186/s12940-017-0345-y
Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5753455/pdf/
Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA
Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:34868958
Downloads of this work:

Show full Dublin Core record

This item appears in the following Collection(s)

 
 

Search DASH


Advanced Search
 
 

Submitters