| Seasonality of mean birth weight and mean gestational period in Japan. | |
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MedLine Citation:
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PMID: 8319945 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Seasonal variations of mean birth weight from January 1974 to December 1983 and of mean gestational period from January 1979 to December 1983 in Japan are analyzed by time-series analysis. This analysis decomposes the variation in a series into trend, seasonal variation, other cyclic changes, and a remaining irregular fluctuation. The results of the present analysis support the existence of a seasonal rhythm of mean birth weight and mean gestational period in Japan with statistical significance (p < 0.001). Seasonal patterns of mean birth weight show two peaks in May and October-November and two troughs in June-September and December. Mean gestational periods shows two peaks in October and February-March and a deep trough in winter and a much smaller one in June-September. Two time series demonstrated a coincidence in monthly variations with statistical significance. These results indicate that a part of seasonality in birth weight could be explained by the seasonal variations in mean gestational period. |
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Authors:
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S Matsuda; T Sone; T Doi; H Kahyo |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Human biology Volume: 65 ISSN: 0018-7143 ISO Abbreviation: Hum. Biol. Publication Date: 1993 Jun |
Date Detail:
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Created Date: 1993-08-03 Completed Date: 1993-08-03 Revised Date: 2011-04-18 |
Medline Journal Info:
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Nlm Unique ID: 0116717 Medline TA: Hum Biol Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 481-501 Citation Subset: IM |
Affiliation:
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Department of Human Ecology, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Age Factors Analysis of Variance Birth Weight* Female Fetal Death / epidemiology Gestational Age* Humans Infant, Newborn Japan / epidemiology Least-Squares Analysis Male Parity Seasons* |
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