Fig. 1
From: Mortality among male smokers and smokeless tobacco users in the USA
Hazard ratios for all-cause mortality among men age 40–79 years, according to tobacco status. Legend: Squares indicate age 40–59 years. Circles indicate age 60–79 years. Numbers are the point estimates; bold numbers represent statistically significant. Horizontal lines represent 95% confidence interval. ST, smokeless tobacco; ref, referent