奈良県における胃がん死亡の年次変化

Abstract

Age-adjusted death rates of gastric cancer in Nara Prefecture were the highest in Japan until the 1960's, but they have fallen rapidly during the period 1965-1990. We analyzed demographically the contribution of the decline of the age-adjusted death rates of gastric cancer in Nara Prefecture. In males, the age-adjusted death rates in Nara Prefecture decreased more than did the national rates. In females, the age-adjusted death rates in Nara Prefecture and Japan fell almost equally. In males, the death rates in the older age groups decreased more than in the younger age groups. The decline of the death rates in the older age groups contributes to the decline of the age-adjusted death rates of gastric cancer in Nara Prefecture. The age-specific mortality ratio (Nara/Japan) correlates with the net migration rate. We suggest that migration affected the decline of the age-adjusted death rates gastric cancer in Nara Prefecture.