Irrespective of period of birth (<1920 or 1920-1945), and for both sexes, death rate ratios were highest among those who had started smoking before age 20 and lowest among those who did not start smoking until they were at least 30, and these trends with age at starting smoking were highly significant (table 4 ).
← all excerpts
Impact of smoking on mortality and life expectancy in Japanese smokers: a prospective cohort study.
1
—
—