Impact of the "Tobacco control law" on exposure to environmental tobacco smoke in Spain

BMC Public Health

Table 1 Characteristics of the samples. Population aged 18 to 64 years. Madrid Region, Spain

	Period prior to the law October-November 2005		Period after the law January-July 2006
	n	%	n	%	p-value
Total	1750	100	1252	100
Sex					0.674^a
Males	846	48.3	615	49.1
Females	904	51.7	637	50.9
Age group					0.473^a
18–29	461	26.3	336	26.8
30–44	707	40.4	479	38.3
45–64	582	33.3	437	34.9
Educational level					0.001^a
University	532	30.5	410	32.7
Secondary, second level	512	29.4	430	34.3
Secondary, first level	487	27.9	286	22.8
Primary or below primary	213	12.2	126	10.1
Number of people in the household	1750	3.5 (mean)	1252	3.3 (mean)	0.000^b
People who work in indoor places away from home	1017	58.1	736	58.8	0.713^a
People who have visited bars in the last month	1551	88.6	1055	84.3	0.000^a
People who have visited restaurants in the last month	1321	75.5	906	72.4	0.054^a
Tobacco consumption					0.550^a
Non-smokers	1195	68.3	842	67.3
Current smokers	555	31.7	410	32.7

p-value: Comparison period after the law versus period prior to it coming into force. ^a Chi-Square test,^b t-test