Congenital Hydrocephalus in Japan : Paternal Age, Maternal Age and Birth Order

Abstract

The statistical association between the incidence of congenital hydrocephaly and paternal age, maternal age and birth order was analyzed in 492 cases of fetal deaths with congenital hydrocephaly reported during 1975-1976. The birth order association was confirmed with a high degree of statistical significance. The quadratic model fitted the data better than the linear one in explaining the variation of incidence of congenital hydrocephaly.