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    Disappearing seasonality in birthweight

    Access Status
    Fulltext not available
    Authors
    Sohn, Kitae
    Date
    2016
    Type
    Journal Article
    
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    Citation
    Sohn, K. 2016. Disappearing seasonality in birthweight. American Journal of Human Biology. 28 (6): pp. 767-773.
    Source Title
    American Journal of Human Biology
    DOI
    10.1002/ajhb.22864
    ISSN
    1042-0533
    URI
    http://hdl.handle.net/20.500.11937/61685
    Collection
    • Curtin Research Publications
    Abstract

    © 2016 Wiley Periodicals, Inc.Objectives: We estimated seasonality in birthweight over time and assessed how seasonality changed. Methods: We analyzed all full-term singletons (N = 8,268,693) born in South Korea in 1997–2014. We first pooled all years and regressed birthweight on birth season while flexibly controlling for a large set of covariates. We then repeated the analysis by birth year and charted the trends in seasonality in birthweight. Results: When we pooled all years, babies born in winter were the heaviest, while those born in summer the lightest; the difference in birthweight was about 11 g. When we analyzed the data by birth year, however, seasonality almost disappeared by the end of the period. Conclusions: Whatever causes the seasonality has lost its influence in Korea. Replication studies can determine whether other countries exhibit the same patterns. Am. J. Hum. Biol. 28:767–773, 2016. © 2016Wiley Periodicals, Inc.

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