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. 2014 Sep 20;16:439. doi: 10.1186/s13058-014-0439-1

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© Eng et al.; licensee BioMed Central Ltd. 2014

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Mutually-adjusted associations of known determinants of mammographic density with percent density (PD) readings in control women. PD readings are the mean of four breast/view readings per woman (except for Quantra and single x-ray absorptiometry - see Methods). BMI, body mass index; HT, hormonal therapy; OC, oral contraceptives; Pt, P for linear trend.