| Nationwide description of live Japanese births by day of the week, hour, and location. | |
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MedLine Citation:
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PMID: 12395874 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To characterize temporal variations of live births in Japan, we analyzed data on the 1,203,147 births of 1998. In hospitals, with 20+ beds, the daily average of live births was significantly lower at weekends and national holidays (mean=1,433, SD = 100) than on weekdays (mean = 1,957, SD = 126). Hourly distributions of live births showed a single sharp peak at 1:00-2:59 pm on weekdays with a small peak at an earlier hour on Saturdays, Sundays and national holidays. The results in clinics, with no bed or less than 20 beds, were similar to those in hospitals except on Saturdays. The difference in the daily average of live births between Saturdays and weekdays was smaller in clinics than that found in hospitals, and hourly distributions on Saturdays resembled those of weekdays but not Sundays or national holidays. Maternity homes showed no differences in the mean number of daily live births over the days of the week including national holidays, and no clear peak of percentage distributions of hourly live births on each day of the week. The present study suggests that the weekly and hourly variations observed in hospitals and clinics are not due to a biological rhythm of labor, but to obstetric intervention in the timing of delivery, either through induction of labor or elective cesarean section. |
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Authors:
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Noriko Morita; Noriko Matsushima; Nozomi Ogata; Keigo Saeki; Mariko Ishibashi; Hideki Komukai; Ryozo Matsuda; Norio Kurumatani |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of epidemiology / Japan Epidemiological Association Volume: 12 ISSN: 0917-5040 ISO Abbreviation: J Epidemiol Publication Date: 2002 Jul |
Date Detail:
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Created Date: 2002-10-24 Completed Date: 2002-11-07 Revised Date: 2004-11-17 |
Medline Journal Info:
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Nlm Unique ID: 9607688 Medline TA: J Epidemiol Country: Japan |
Other Details:
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Languages: eng Pagination: 330-5 Citation Subset: IM |
Affiliation:
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Department of Hygiene, Nara Medical University, Kashihara, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Birth Rate Circadian Rhythm Delivery, Obstetric Humans Infant, Newborn* Japan |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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