International Journal of Epidemiology, Vol 28, 30-34, Copyright © 1999 by International Epidemiological Association
K Makimoto and S Higuchi
BACKGROUND: Age-adjusted liver cancer mortality rates have been increasing
for both men and women in Japan since 1970; however, increases in mortality
rates in men are much greater than those in women. Hepatitis C virus
infections and heavy alcohol consumption are considered to be the major
risk factors of liver cancer deaths in Japanese. The purpose of this study
is (1) to examine the pattern of liver cancer mortality by gender and birth
year to compare those with the pattern of other alcohol-related mortality
and (2) to estimate the attributable risk per cent of heavy alcohol
consumption for liver cancer deaths in Japanese men. METHODS: Age-specific
liver cancer mortality rates by gender were compared with those of
cirrhosis mortality rates. Then male-to-female mortality rate ratios were
calculated by birth cohort and compared with cirrhosis mortality rate
ratios and oesophageal cancer mortality rate ratios. The attributable risk
per cent of alcohol consumption for liver cancer death was calculated,
using female liver cancer mortality rates as standard rates. RESULTS:
Examination of both gender and birth cohort mortality rates revealed that
male-to-female liver cancer mortality rate ratios by birth cohort
correspond well with those rate ratios for liver cirrhosis and oesophageal
cancer mortality. The attributable risk per cent of alcohol consumption for
liver cancer deaths in Japanese men was 70%. CONCLUSION: Alcohol
consumption is more important than hepatitis C virus infections as a major
cause of liver cancer deaths in Japanese men.
ARTICLES
Alcohol consumption as a major risk factor for the rise in liver cancer mortality rates in Japanese men
Department of Nursing, Kanazawa University, Japan.
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