Table 1. Comparison of demographic data and prevalence of asthma and rhinitis symptoms in 13- and 14-year-olds between two surveys conducted in the city of Fortaleza, Brazil. 2006-2007 and 2010.

Variable	Period	p
2006-2007			2010
(n = 3,015)			(n = 3,020)
n	%		n	%
Age							0.34
	13 years	1,575	52.2		1,614	53.4
	14 years	1,440	47.8		1,406	46.6
School							< 0.01
	Public	2,165	71.8		2,559	84.7
	Private	850	28.2		461	15.3
Gender							0.89
	Male	1,372	45.5		1,369	45.3
	Female	1,643	54.5		1,651	54.7
Cumulative wheezing		1,329	44.1		1,326	44.5	0.74
Current wheezing (active asthma)		682	22.6		708	23.4	0.44
Number of attacks within the last 12 months
	1-3	528	17.5		547	18.1	0.54
	≥ 4	68	2.3		83	2.7	0.22
Sleep disturbed by wheezing
	< 1 night per week	204	6.8		198	6.6	0.74
	≥ 1 night per week	105	3.5		106	3.5	0.95
Speech-limiting wheezing		105	3.5		109	3.6	0.79
Exercise-induced wheezing		759	25.2		855	28.8	< 0.01
Dry cough at night		1,036	34.4		1,136	37.9	< 0.01
Physician-diagnosed asthma		350	11.6		433	14.5	< 0.01
Cumulative rhinitis		1,710	56.7		1,688	57.1	0.78
Current or active rhinitis		1,303	43.2		1,279	42.4	0.49
Rhinoconjunctivitis (allergic rhinitis)		565	18.7		535	17.7	0.30
Rhinitis-related impairment of daily activities
	None	567	18.8		590	19.5	0.47
	Mild	581	19.3		582	19.3	0.99
	Moderate	81	2.7		81	2.7	0.99
	Severe	60	2.0		37	1.2	0.01
Physician-diagnosed rhinitis		609	20.2		520	17.6	0.01