Recent studies suggest that prenatal or early post-natal factors may influence future breast cancer risk.
To investigate whether month of birth is a risk factor for breast cancer, we analyzed the distribution of month of birth for 81,162 women died of breast cancer and 1,334,650 women died of cancers at all sites, who were reported to the Ministry of Health and Welfare from 1972-90 in Japan.
After considering each birth year seasonal variations in month of birth were not shown statistically significant in any age-group through using khi2 test (df=11).
The negative results were also confirmed in residential area and period category.
Mots-clés Pascal : Date naissance, Variation saisonnière, Facteur risque, Tumeur maligne, Glande mammaire, Japon, Asie, Homme, Femelle, Epidémiologie, Glande mammaire pathologie
Mots-clés Pascal anglais : Birth date, Seasonal variation, Risk factor, Malignant tumor, Mammary gland, Japan, Asia, Human, Female, Epidemiology, Mammary gland diseases
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 96-0446988
Code Inist : 002B20E02. Création : 10/04/1997.