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Growth Trajectories, Breast Size, and Breast-Tissue Composition in a British Prebirth Cohort of Young Women.

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Date
2018-06
ICR Author
Doran, Simon
Leach, Martin
Author
Denholm, R
De Stavola, B
Hipwell, JH
Doran, SJ
Busana, MC
Leach, MO
Hawkes, DJ
Dos-Santos-Silva, I
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Type
Journal Article
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Abstract
Mammographic percent density, the proportion of fibroglandular tissue in the breast, is a strong risk factor for breast cancer, but its determinants in young women are unknown. We examined associations of magnetic resonance imaging (MRI) breast-tissue composition at age 21 years with prospectively collected measurements of body size and composition from birth to early adulthood and markers of puberty (all standardized) in a sample of 500 nulliparous women from a prebirth cohort of children born in Avon, United Kingdom, in 1991-1992 and followed up to 2011-2014. Linear models were fitted to estimate relative change in MRI percent water, which is equivalent to mammographic percent density, associated with a 1-standard-deviation increase in the exposure of interest. In mutually adjusted analyses, MRI percent water was positively associated with birth weight (relative change (RC) = 1.03, 95% confidence interval (CI): 1.00, 1.06) and pubertal height growth (RC = 1.07, 95% CI: 1.02, 1.13) but inversely associated with pubertal weight growth (RC = 0.86, 95% CI: 0.84, 0.89) and changes in dual-energy x-ray absorptiometry percent body fat mass (e.g., for change between ages 11 years and 13.5 years, RC = 0.96, 95% CI: 0.93, 0.99). Ages at thelarche and menarche were positively associated with MRI percent water, but these associations did not persist upon adjustment for height and weight growth. These findings support the hypothesis that growth trajectories influence breast-tissue composition in young women, whereas puberty plays no independent role.
URI
https://repository.icr.ac.uk/handle/internal/855
DOI
https://doi.org/10.1093/aje/kwx358
Collections
  • Radiotherapy and Imaging
Subject
Breast
Humans
Magnetic Resonance Imaging
Prospective Studies
Body Composition
Puberty
Sexual Maturation
Adolescent
Child
Child, Preschool
Infant
Infant, Newborn
Young Adult
Research team
Magnetic Resonance
Language
eng
Date accepted
2017-11-01
License start date
2018-06
Citation
American journal of epidemiology, 2018, 187 (6), pp. 1259 - 1268

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