Disappearing seasonality in birthweight
© 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...
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| Format: | Journal Article |
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John Wiley & Sons, Inc.
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/61685 |
| _version_ | 1848760708562419712 |
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| author | Sohn, Kitae |
| author_facet | Sohn, Kitae |
| author_sort | Sohn, Kitae |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 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. |
| first_indexed | 2025-11-14T10:20:04Z |
| format | Journal Article |
| id | curtin-20.500.11937-61685 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T10:20:04Z |
| publishDate | 2016 |
| publisher | John Wiley & Sons, Inc. |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-616852018-02-01T05:56:15Z Disappearing seasonality in birthweight Sohn, Kitae © 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. 2016 Journal Article http://hdl.handle.net/20.500.11937/61685 10.1002/ajhb.22864 John Wiley & Sons, Inc. restricted |
| spellingShingle | Sohn, Kitae Disappearing seasonality in birthweight |
| title | Disappearing seasonality in birthweight |
| title_full | Disappearing seasonality in birthweight |
| title_fullStr | Disappearing seasonality in birthweight |
| title_full_unstemmed | Disappearing seasonality in birthweight |
| title_short | Disappearing seasonality in birthweight |
| title_sort | disappearing seasonality in birthweight |
| url | http://hdl.handle.net/20.500.11937/61685 |