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Dairy intake in relation to breast and pubertal development in chilean girls

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2017-05-01
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Gaskins, Audrey J.
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Dairy intake in relation to breast and pubertal development in chilean girls
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Author
  • Gaskins, Audrey J.;
  • Pereira Scalabrino, Ana;
  • Quintiliano Scarpelli, Daiana;
  • Shepherd, John A.;
  • Uauy Dagach-Imbarack, Ricardo;
  • Corvalán Aguilar, Camila;
  • Michels, Karin B.;
Abstract
Background: Frequent dairy consumption in childhood has been related to higher growth-hormone concentrations that may affect mammary gland and pubertal development. Objective: We evaluated the relation of dairy intake to breast composition at Tanner stage 4 and age at menarche. Design: A total of 515 Chilean girls are included in the Growth and Obesity Cohort Study. The subjects have been followed longitudinally since they were 3-4 y old (from 2006 to the present). Starting in 2013, diet was assessed every 6 mo via a 24-h recall. The breast fibroglandular volume (FGV) was measured with the use of dual-energy X-ray absorptiometry at Tanner stage 4. The date of menarche was reported every 6 mo. Our analysis included 290 girls with data on prospective diet and breast composition and 324 girls with data on prospective diet and age at menarche. Results: The mean +/- SD breast FGV and percentage of fibroglandular volume (%FGV) (i.e., FGV divided by total breast volume times 100) at Tanner stage 4 was 81.7 +/- 6 32.2 cm(3) and 42.0% +/- 16.7%, respectively. Only sweetened, artificially flavored milk-based drinks were associated with the %FGV with girls who consumed > 125 g/d having a %FGV that was 4.5% (95% CI: 0.9%, 8.1%) higher than that of girls who consumed none (P-trend = 0.007). Yogurt intake was associated with a lower FGV. Specifically, girls who consumed > 125 g yogurt/d had -10.2 cm(3) (95% CI: -20.2, -0.3 cm(3)) less FGV than did girls who consumed no yogurt (P-trend = 0.03). The majority (90.7%) of girls in our cohort attained menarche before the data analyses with a mean +/- SD age at menarche of 11.9 +/- 6 0.7 y. In multivariable models, low-fat dairy, low-fat milk, and yogurt intakes were associated with a later age at menarche. In particular, girls who consumed > 125 g yogurt/d had menarche, on average, 4.6 mo (95% CI: 1.9, 7.4 mo) later than girls who consumed no yogurt (P-trend = 0.01). Conclusion: More-frequent consumption of sweetened, artificially-flavored milk-based drinks is associated with a higher %FGV, whereas higher yogurt intake is associated with a lower FGV and delayed age at menarche in Chilean girls.
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National Cancer Institute, NIH US Department of Health and Human Services (Public Health Service) R01 CA158313 World Cancer Research Fund 2010/245
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Artículo de publicación ISI
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URI: https://repositorio.uchile.cl/handle/2250/146967
DOI: 10.3945/ajcn.116.150359
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American Journal of Clinical Nutrition, Volumen: 105 Número: 5 Páginas: 1166-1175 (2017)
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