3.3 Age effect Age effect demonstrated an increasing trend in younger age groups and a decreasing tendency in older age groups in both Chinese and the US adults (Figure 3a , Table 1 ), suggesting that the RR of smoking‐attributable mortality varied between younger and older age groups.
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The mortality of lung cancer attributable to smoking among adults in China and the United States during 1990-2017.
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From 1902‐1906 to 1987‐1991 birth cohorts, th mortality of lung cancer attributable to smoking generally showed a decreasing trend in both China and US. 4 DISCUSSION In the present study, we performed an age‐period‐cohort analysis to estimate the age, period, and birth cohort effects of the mortality of lung cancer attributable to smoking among adults aged 30 years and older in China and the US.