Socioeconomic Inequalities in Alcohol and Tobacco Consumption: A National Ecological Study in Mexican Adolescents

Table 1

Distribution of included adolescents by age group, Mexico.

Age group	Elementary school			Middle school
	n	N (thousands)	%	n	N (thousands)	%
10 years	6,655	2,113.1	35.3	6	0.4	0.01
11 years	6,734	2,105.0	35.2	65	14.9	0.3
12 years	4,089	1,384.3	23.1	5,103	1,007.0	17.9
13 years	850	273.2	4.6	9,592	1,756.0	31.1
14 years	206	78.5	1.3	9,560	1,807.1	32.0
15 years	48	24.1	0.4	4,932	861.5	15.3
16 years	11	3.2	0.1	986	192.8	3.4
	18,593	5,981.4	100.0	30,244	5,639.7	100.0