Decrease in the prevalence of smoking among Japanese adolescents and its possible causes: periodic nationwide cross-sectional surveys

Table 3 Usual sources of cigarettes reported by current smokers

Sex	High school	Year	Searching in house (%) CI	Getting from someone CI	Tobacconist shop CI	Stores CI	Vending machine CI	Number of current smokers
Male	Junior	1996	24.2 ± 0.3	33.4 ± 0.2	17.0 ± 0.2	17.8 ± 0.3	60.3 ± 0.4	2,453
		2000	21.4 ± 0.2	37.1 ± 0.2	13.4 ± 0.2	21.3 ± 0.2	64.6 ± 0.2	2,389
		2004	22.1 ± 0.5	30.6 ± 0.8 **	12.0 ± 0.2	13.5 ± 0.2 **	61.1 ± 0.4	1,049
	Senior	1996	15.1 ± 0.1	30.9 ± 0.2	27.3 ± 0.3	42.6 ± 0.5	84.3 ± 0.1	11,869
		2000	14.0 ± 0.1	33.1 ± 0.1	26.2 ± 0.3	49.4 ± 0.3	85.8 ± 0.1	8,818
		2004	13.2 ± 0.4	29.2 ± 0.4 **	20.8 ± 0.2 **	41.5 ± 0.3 **	82.5 ± 0.1 **	5,625
Female	Junior	1996	39.4 ± 0.4	41.6 ± 0.3	11.7 ± 0.2	16.1 ± 0.3	54.0 ± 0.4	1,048
		2000	27.8 ± 0.3	47.5 ± 0.3	9.0 ± 0.1	17.9 ± 0.3	60.7 ± 0.3	1,206
		2004	31.5 ± 1.3	40.8 ± 1.6 **	8.9 ± 0.3	12.7 ± 0.3 *	59.4 ± 0.4	677
	Senior	1996	18.5 ± 0.2	35.1 ± 0.2	13.2 ± 0.3	28.4 ± 0.5	76.6 ± 0.2	4,696
		2000	15.4 ± 0.1	35.8 ± 0.2	10.2 ± 0.1	36.2 ± 0.3	80.3 ± 0.2	3,824
		2004	17.0 ± 0.6	32.6 ± 0.8 **	9.9 ± 0.2	34.2 ± 0.3	77.8 ± 0.2	2,263

CI, 95% Confidence interval
* P < 0.05, ** P < 0.01; result of statistical testing between 2000 and 2004
Percentages add up to more than 100% as some students mentioned more than one source of cigarettes

ISSN: 1347-4715