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. 2020 May 21;8(6):e850–e857. doi: 10.1016/S2214-109X(20)30221-7

Figure 5.

Figure 5

All-cause mortality in the USA at ages 30–69 years for cigarette smokers versus never-smokers by age when starting to smoke

Box area is inversely proportional to the variance of the log risk. Error bars denote group-specific 95% CIs. Age when starting to smoke regularly was divided into the following categories: younger than 10 years (233 deaths), 10–14 years (1566 deaths), 15–17 years (2237 deaths), 18–20 years (1539 deaths), and older than 20 years (1116 deaths). Data sources were the US National Health Interview Surveys and US National Death Index. Analyses were adjusted for age at risk, sex, race, education, alcohol consumption, and region.