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The preventive effect of breast-feeding for longer than 6 months on early pubertal development among children aged 7-9 years in Korea

Title
The preventive effect of breast-feeding for longer than 6 months on early pubertal development among children aged 7-9 years in Korea
Authors
Lee, Hye AhKim, Young JuLee, HwayoungGwak, Hye SunHong, Young SunKim, Hae SoonPark, Eun AeCho, Su JinHa, Eun HeePark, Hyesook
Ewha Authors
하은희박은애김영주김혜순박혜숙홍영선이화영곽혜선조수진이혜아
SCOPUS Author ID
하은희scopus; 박은애scopus; 김영주scopus; 김혜순scopus; 박혜숙scopus; 홍영선scopus; 이화영scopus; 곽혜선scopus; 조수진scopus; 이혜아scopus
Issue Date
2015
Journal Title
PUBLIC HEALTH NUTRITION
ISSN
1368-9800JCR Link1475-2727JCR Link
Citation
vol. 18, no. 18, pp. 3300 - 3307
Keywords
Breast-feedingCohort studyEarly puberty development
Publisher
CAMBRIDGE UNIV PRESS
Indexed
SCIE; SCOPUS WOS scopus
Abstract
Objective: The present study was performed to investigate whether breast-feeding is associated with early pubertal development among children 7-9 years old in Korea. Design: Children were divided into those who did and did not receive breast-feeding for 6 months or longer in accordance with the recommendations of the WHO. Pubertal status was determined by clinical examination using Tanner staging. Setting: Prospective observational study. Subjects: We conducted a follow-up study of children aged 7-9 years in 2011 who had taken part in the Ewha Birth & Growth Cohort study. Results: Fifty (22.8 %) of the total of 219 children were in early puberty, with the proportion being slightly higher for girls (24.1 %) than boys (21.4 %). Children who had entered early puberty were taller, weighed more and had a higher concentration of insulin-like growth factor 1. Moreover, the change in weight Z-score from birth to follow-up was significantly lower in children who were breast-fed than in those who were not (weight Z-score change: 0.32 (sd 1.59) v. 0.77 (sd 1.61), respectively, P=0.04). Comparison of breast-feeding by puberty status indicated a preventive association with early puberty in children who were breast-fed for 6 months or longer (OR=0.37; 95 % CI 0.18, 0.74). This association remained significant after adjustment for relevant covariates. Conclusions: These results demonstrate a beneficial association between breast-feeding and early pubertal development, especially in those breast-fed for 6 months or longer. The study suggests that interventions would need to start early in life to prevent early pubertal development.
DOI
10.1017/S1368980015000518
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의학전문대학원 > 의학과 > Journal papers
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