Table 3. Comparison, by type of school, of temporal changes in the 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.

Symptom	Public	p	Private	p
2006-2007		2010	2006-2007		2010
n°	%		n°	%	n°	%		n°	%
Cumulative wheezing		907	41.9		1,071	42.4	0.73	422	49.6		255	56.3	0.02
Active asthma		442	20.4		548	21.4	0.40	240	28.2		160	34.7	0.01
Number of attacks within the last 12 months
	1-3	334	15.4		424	16.6	0.28	194	22.8		123	26.7	0.11
	≥ 4	34	1.6		60	2.3	0.05	34	4.0		23	5.0	0.40
Sleep disturbed by wheezing
	< 1 night/week	140	6.5		162	6.3	0.84	64	7.5		36	7.8	0.85
	≥ 1 night/week	82	3.8		80	3.1	0.21	23	2.7		26	5.6	< 0.01
Speech-limiting wheezing		70	3.2		87	3.4	0.75	35	4.1		22	4.8	0.57
Exercise-induced wheezing		522	24.1		707	28.1	< 0.01	237	27.9		148	32.4	0.08
Dry cough at night		721	33.3		941	37.0	< 0.01	315	37.1		195	42.6	0.05
Physician diagnosed asthma		220	10.2		353	13.9	< 0.01	130	15.3		80	17.5	0.29
Cumulative rhinitis		1,132	52.3		1,378	55.1	0.05	578	68.0		310	67.8	0.95
Current or active rhinitis		822	38.0		1,021	39.9	0.17	481	56.6		258	56.0	0.82
Rhinoconjunctivitis		336	15.5		417	16.3	0.46	229	26.9		118	25.6	0.59
Rhinitis-related impairment of daily activities
	None	314	14.5		454	17.7	< 0.01	253	29.8		136	29.5	0.92
	Mild	404	18.7		480	18.8	0.93	177	20.8		102	22.1	0.58
	Moderate	52	2.4		65	2.5	0.76	29	3.4		16	3.5	0.95
	Severe	41	1.9		29	1.1	0.03	19	2.2		8	1.7	0.54
Physician-diagnosed rhinitis		326	15.1		365	14.6	0.66	283	33.3		155	33.9	0.82