Table 2A.

Smoking behavior.

	Baseline visit	Follow-up visit	p-Values
E-cigarette Smoker
E-cigarettes/day	0.78 (0.25)	0.74 (0.51)	0.70
Puffs/use	151.3 (104.4)	94.4 (99.1)	0.03
Cigarette Smoker
Cigarettes/day	13.5 (4.8)	12.3 (4.4)	0.17