Variations of live births and fetal deaths by day of week.

Esaki, Hiroji; Watanabe, Daisuke; Momose, Yoshito

doi:10.3861/jshhe.51.140

Cited by 1 publication

(3 citation statements)

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“…Ando 5 analyzed about 3,200 cases collected for five years since 1988 from 18 medical institutions, mainly university hospitals in Tokyo. Esaki et al 7 observed that the daily number of live births on weekdays was three times larger than that of national holidays. Ando, 5 not considering national holidays, indicated that live births occurred frequently on Tuesdays and Fridays and less on Saturdays and Sundays.…”

Section: Discussionmentioning

confidence: 98%

“…All of them showed similar results, although those were based on much smaller cases in a limited area. For example, Esaki et al 7 evaluated about 3,500 cases over three years since 1981 in a middle sized city located in west Japan. Ando 5 analyzed about 3,200 cases collected for five years since 1988 from 18 medical institutions, mainly university hospitals in Tokyo.…”

Section: Discussionmentioning

confidence: 99%

“…However, there have only been a few studies and those results were based on data in limited medical institutions such as university hospitals 5 , 6 or in cities. 7 , 8 Therefore, those findings may not represent the nationwide pattern. In addition, the characteristics of live birth distributions in hospitals and clinics can be shown much more clearly when compared with those in non-medical delivery facilities.…”

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confidence: 97%

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Nationwide Description of Live Japanese Births by Day of the Week, Hour, and Location.

Morita

Matsushima

Ogata

et al. 2002

Journal of Epidemiology

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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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Section: Discussionmentioning

confidence: 98%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 97%

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