Table 3.

Student characteristics by trial of e-cigarettes, conventional cigarettes, or both

	No trial (n=7,180)	E-cigarette only trial (n=452)	Cigarette only trial (n=1,923)	Dual trier (n=592)
	71%	4%	19%	6%
Sex
Male	48%c	60%	52%c	57%
Age
11 or 12	64%b	61%	53%a	52%a
13	33%	34%	39%	39%
14 or more	3%	6%	7%	9%
Student currently working	15%	17%	22%b	24%b
Parental education level
Primary school	13%c	23%	22%	23%
Secondary school	36%	33%	39%	34%
High school or technical school	25%	21%	20%	21%
University or more	17%	15%	11%	13%
Unknown	9%	8%	7%	9%
Sensation seeking, (1-5), Mean (SD)	2.73 (1.04)c	3.21 (1.08)	3.19 (0.98)	3.45 (0.97)c
Alcohol use (ever use)	35%c	54%	72%c	81%c
Drug use (ever use)	6%c	20%	26%b	44%c
Technophilia, (0-3), Mean (SD)	1.76 (1.01)c	1.96 (1.03)	1.71 (1.01)c	2.04 (0.97)
Internet access in bedroom	68%c	75%	65%c	76%
Internet tobacco ad exposure
Never	54%c	44%	46%c	40%
Rarely/sometimes	40%	41%	45%	48%
Mostly/always	6%	15%	9%	12%
Parent smokes*	38%c	48%	54%a	59%c
Sibling smokes*	11%c	20%	26%c	36%b
Friend smokes*	26%c	45%c	58%c	73%c
Positive smoking expectancies*1-5 Mean (SD)	1.61 (0.79)c	2.08 (1.05)	2.27 (1.00)c	2.62 (0.98)c
Awareness & perceived risks of e-cigarettes**
Aware, and perceive as less risky	14%c	47%	18%c	52%c
Aware, and perceive as equally or more risky	18%	17%	18%	21%
Unaware of e-cigarettes or don't know risk	66%	36%	64%	27%

^ap<0.05 vs. e-cigarette only

^bp<0.01 vs. e-cigarette only

^cp<0.001 vs. e-cigarette only.

^*conventional cigarettes

^**compared to conventional cigarettes