Seasonal variations of births in six different prefectures in Japan are analysed using Vital Statistics from 1974 to 1983.
First births show a bimodal pattern with two peaks, one in winter (December-February) and the other in summer to early autumn (August-September).
The seasonality of first births is statistically significantly correlated with the seasonality of marriages with 9+12*n (n=0,1,2,3) lag months.
For subsequent births, the seasonal pattern is unimodal and there is also a geographical trend in seasonality of these births with a late spring peak in the northernmost prefecture of Japan giving way to an early autumn peak in the southernmost prefecture.
Mots-clés Pascal : Natalité, Epidémiologie, Japon, Asie, Variation géographique, Variation saisonnière, Statistique, Homme
Mots-clés Pascal anglais : Natality, Epidemiology, Japan, Asia, Geographical variation, Seasonal variation, Statistics, Human
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 94-0261610
Code Inist : 002B29A. Création : 199406.