Table 2

Proportion of sample seeing cigarette packs in the previous 6 months and characteristics of these students in 2011 and 2013 surveys

	Unweighted data			Weighted data
	2011	2013	p Value	2011	2013	p Value
Total number of students surveyed (N)	6338	5915		6338	5984
Saw cigarette packs in previous 6 months: N (%)	3888 (61)	3852 (65)	<0.001	3802 (60)	3886 (65)	0.004
Among students seeing packs in previous 6 months
Sex (% males)	43	49	<0.001	45	50	0.26
Age			<0.001			0.79
12–15-year olds	62	69		66	68
16–17-year olds	38	31		34	32
Mother smokes (% yes)	27	25	0.04	27	24	0.22
Father smokers (% yes)	33	31	0.14	33	29	0.083
Percentage of students with no friends who smoke	61	71	<0.001	64	72	0.003
Smoking status (%)
NSNS	56	65	<0.001	58	66	0.003
SNS	9	9	0.48	9	9	0.87
ES	23	18	<0.001	22	17	0.002
CS	12	8	<0.001	11	7	0.008

CS, smoking in past week/established smokers; ES, experimental smokers; NSNS, non-susceptible never-smokers; SNS, susceptible never-smokers.