Table 1

Demographic characteristics and smoking behaviour of sample, ITC Mexico Survey 2008, 2010, 2011 (unweighted means and proportions)

Characteristics	All current smokers at each wave
	Wave 3 (2008)		Wave 4 (2010)		Wave 5 (2011)
	n=1644		n=1572		n=1507
	%/mean	n	%/mean	n	%/mean	n
Age (years)
18–24	18.55	305	16.67	262	15.76	237
25–39	36.62	602	36.45	573	37.57	565
40–54	28.41	467	28.56	449	29.19	439
55 or more	16.42	270	18.32	288	17.49	263
Sex
Male	63.14	1038	62.79	987	62.66	943
Female	36.86	606	37.21	585	37.34	562
Education level*
Primary or less	26.93	440	30.79	484	28.66	431
Secondary	29.38	480	30.79	484	32.05	482
High school	26.99	441	24.36	383	24.73	372
Graduate or more	16.71	273	14.06	221	14.56	219
Monthly household income**
Low (MX$0 to MX$3000)	25.03	409	28.18	443	21.51	324
Medium (MX$3001 to MX$5000)	24.54	401	24.62	387	34.00	512
High (MX$5001 or more)	38.49	629	39.95	628	37.92	571
Don't know	11.93	195	7.25	114	6.57	99
Waves of participation*	2.89	1644	2.95	1567	2.76	1503
Smoking status
Less than daily	33.9	557	33.04	517	32.02	481
Daily, five cigarettes per day or less	30.55	502	30.29	474	32.29	485
Daily, more than five cigarettes per day	35.54	584	36.68	574	35.69	536
Form of last cigarette purchase**
Pack of cigarettes	82.31	1349	79.05	1234	76.14	1139
Single cigarette	16.78	275	20.24	316	23.13	346
Carton of cigarette packs	0.92	15	0.70	11	0.74	11
Brand of last cigarette purchase* †
International	78.42	1272	79.20	1226	82.02	1200
National	21.58	350	20.80	322	17.98	263
Price per cigarette at last purchase**‡
International brands, packs of cigarettes	1.47	1025	1.61	933	1.93	896
International brands, single cigarettes	2.50	233	3.15	278	3.39	289
National brands, packs of cigarettes	1.16	311	1.21	287	1.60	204
National brands, single cigarettes	2.27	36	2.29	31	3.27	47

*p<0.05, **p<0.01; p values for the association of survey wave and variables.
†International brands include Marlboro, Camel, Benson and other international brands purchased by less than 2% of respondents (eg, Pall Mall, Lucky Strike, Salem); national brands include Montana, Delicados, Boots, Raleigh and other national brands purchased by less than 2% of respondents (eg, Broadway, Alas, Fiesta, Faros).
‡Prices per cigarette are in Mexican pesos (MX$), adjusted for inflation to April 2012. The exchange rate in April 2012 was MX$12.99 per US$.