Table 3.

Perceived potential health effects of e-cigarettes reported by e-cigarette user groups.

	E-cigarette Use*
Health effects	Current (n = 870)	Past (n = 1202)	Never (n = 1682)
Anxietya	17.0%	26.2%	30.3%
Asthmaa	34.4%	54.8%	59.0%
Cancera	36.0%	59.0%	61.2%
Cougha	61.7%	73.5%	72.0%
Explosion/Burna	37.8%	52.5%	54.0%
Mouth irritationa	53.0%	67.7%	69.4%
Lung infectiona	34.9%	58.2%	63.9%
Lung damagea	40.7%	63.1%	65.8%
Nonea	5.3%	1.8%	.5%
Unsure	10.5%	10.7%	12.7%

*Percentages were calculated by using responses of respective users of e-cigarettes, respondents were not limited to a single response regarding perceived health effects of e-cigarettes.

^aP < .05, Kruskal-Wallis test.