Predictors of intentions to use cigarettes and electronic-cigarettes among high school students

Figures & data

Table 1 Percentage of participants with family members smoking tobacco or using e-cigarette at home, according to their current consumption status and the intention to consume in future

	n (%)	X^2 (p-value)
Family member smokes tobacco at home
Tobacco cigarette user status
Smokers	12 (44.4)	2.7 (0.1)
Non smokers	129 (29.5)
E-cigarette user status
Users	8 (72.7)	-- (0.28)^a
Non users	12 (50)
Future intention to use tobacco cigarette
I will smoke	35 (46.7)	11.3 (0.001)***
I will not smoke	106 (27.2)
Future intention to use e-cigarettes
I will use	19 (45.2)	5.1 (0.02)*
I will not use	120 (28.5)
Family member uses e-cigarette at home
Tobacco cigarette user status
Smokers	2 (7.4)	-- (0.37)^a
Non smokers	17 (3.9)
E-cigarette user status
Users	4 (36.4)	-- (0.17)^a
Non users	3 (12.5)
Future intention to use tobacco cigarette
I will smoke	4 (5.4)	-- (0.52)^a
I will not smoke	15 (3.8)
Future intention to use e-cigarettes
I will use	5 (11.9)	-- (0.02)^a,*
I will not use	13 (3.1)

Notes: ^aExact Fisher test. *p≤0.05; **p≤0.01; ***p≤0.001.

Table 2 Percentage of participants with friends who smoke tobacco or use e-cigarettes, according to their current consumption status and their intention to consume in the future

	n (%)	X^2 (p-value)
My friends smoke tobacco cigarettes or use e-cigarettes
Tobacco cigarette user status
Smokers	20 (87)	9.8 (0.002)**
Non smokers	176 (53.3)
E-cigarette user status
Users	12 (100)	9.8 (0.002)**
Non Users	187 (54.4)
Future intention to use tobacco cigarettes
I will smoke	45 (76.3)	12.4 (<0.001)***
I will not smoke	151 (51.4)
Future intention to use e-cigarettes
I will use	33 (86.8)	9.8 (0.002)**
I will not use	164 (51.9)

Note: *p≤0.05; **p≤0.01; ***p≤0.001.

Table 3 Percentage of participants with the intention to smoke tobacco cigarettes or use e-cigarettes in the future, by current consumption status

	Smokers,n (%)	Non smokers, n (%)	X^2 (p-value)	E-cigarette users, n (%)	Non e-cigarette users, n (%)	X^21 (p-value)
Will smoke	22 (81.5)	54 (12.3)	89.4 (<0.001)***	8 (72.7)	68 (14.9)	--(<0.001)^a,***
Will use e-cigarettes	9 (33.3)	34 (7.7)	19.88 (<0.001)***	7 (63.6)	36 (7.9)	--(<0.001)^a,***

Notes: ^aExact Fisher test. *p≤0.05; **p≤0.01; ***p≤0.001.

Table 4 Percentage of participants according their perceived risk of smoking tobacco and using e-cigarettes, their current consumption status and intention to consume in the future)

	Not dangerous, n (%)	Moderately dangerous, n (%)	Very dangerous, n (%)	X^22 (p-value)
Smoker	2 (7.4)	18 (66.7)	7 (25.9)	1.2 (0.54)^a
Non smoker	15 (3.5)	286 (66.2)	131 (30.3)
E-cigarettes user	12 (18.2)	7 (63.6)	2 (18.2)	6.9 (0.03)^a,*
Non e-cigarettes user	15 (3.3)	297 (66.3)	136 (30.4)
Will smoke	8 (10.7)	55 (73.3)	12 (16)	18.3 (<0.001)^a,***
Won’t smoke	9 (2.3)	248 (64.8)	126 (32.9)
Will use e-cigarettes	5 (11.9)	28 (66.7)	9 (21.4)	9.5 (0.009)^a,**
Won’t use e-cigarettes	12 (2.9)	274 (66)	129 (31.1)

Notes: ^aOne or two cells have expected frequencies under five. *p≤0.05; **p≤0.01; ***p≤0.001.

Table 5 Predictors of the intention to smoke tobacco and use e-cigarettes in the future

Predictors	Wald (p-value)	OR	95% CI
Intention to smoke in the future
Had smoked some time in their life	15.2 (<0.001)***	0.19	0.08–0.44
Currently smoke	13.6 (<0.001)***	0.06	0.02–0.27
Somebody smokes at home	6.6 (0.01)**	0.39	0.19–0.80
Perceived danger Not dangerous Moderately dangerous	6.9 (0.03)* 6.2 (0.01)** 3.9 (0.05)*	6.59  2.52	1.50–28.97 1.01–6.32
Intention to use e-cigarettes in the future
Had smoked some time in their life	7.1 (0.008)**	0.33	0.14–0.74
Currently use e-cigarettes	7.1 (0.008)**	0.15	0.04–0.61
My friends smoke or use e-cigarettes	7.5 (0.006)**	0.22	0.07–0.65

Note: *p≤0.05; *p≤0.01; ***p≤0.001.