pencil cigarette No Smoking An unlit cigarette

Smokers who used e-cigarettes within 5 years of quitting in this group had a 1.26 (95% CI, 1.03-1.54) times greater risk for lung cancer than those who did not use e-cigarettes within 5 years of quitting

Lorillard, (Old Gold), or Philip Morris

Results Over an average of 13.7 (0.9) days, each subject recorded an average total of 303.5 (SD=122.5) individual cigarettes on ED, with an additional 9.2 (11.1) reported at end of day

Therefore, the results related to these two variables must be interpreted with caution, as they may be biased

Carbon monoxide reduces the blood's ability to carry oxygen, putting an extra burden on the body's vital organs