Table 1. Sociodemographic and lifestyle indicators of the study population.

Variables	Categories	n	%
Sex	Men	472	19.1
	Women	2,004	80.9
Age group (years)	21-30	136	5.6
	31-40	1,293	53.7
	41-50	750	31.1
	≥51	229	9.5
Ethnic group	Mestizo	2,299	92.9
	Others	177	7.1
Education	Primary	349	14.1
	Incomplete Secondary	419	16.9
	Completed Secondary	1,189	48
	University	517	20.9
Humidity at house	No	1,746	70.5
	Yes	730	29.5
Mould at house	No	1,985	80.2
	Yes	491	19.8
Smoking habit in the past	Never	1,917	77.4
	Seldom	453	18.3
	Daily	106	4.3
Smoking habit in the present	Never	2,179	88
	Seldon	248	10
	Daily	49	2
Traffic around the house	Never	201	8.2
	Seldom	962	39.2
	Frequently in the day	666	27.1
	Day and night	627	25.5
Cat at home	No	1,697	69.1
	Yes	759	30.9
Dog at home	No	726	29.6
	Yes	1,730	70.4
Rhinitis ever	No	2,138	86.3
	Yes	338	13.7
Eczema ever	No	2,340	94.5
	Yes	136	5.5