Table 1.

Prevalence of asthma with 95% confidence intervals (CI) by age and sex

Age group (years)	Prevalence of asthma in (%, 95% CI)						P*
	No.	boys	No.	girls	No.	both sexes
0-4	206	3.9 (1.7-7.5)	177	5.1 (2.4-9.4)	383	4.4 (2.6-7.0)	0.569
5-9	167	13.8 (8.9-20.0)	190	9.5 (5.7-14.6)	357	11.5 (8.4-15.3)	0.211
10-14	265	9.4 (6.2-13.6)	216	5.6 (2.9-9.5)	481	7.7 (5.5-10.5)	0.112
15-18	127	7.1 (3.3-13.0)	116	3.4 (1.0-8.6)	243	5.3 (2.9-9.0)	0.208
Total	765	8.5 (6.6-10.7)	699	6.2 (4.5-8.2)	1 464	7.4 (6.1-8.8)	0.086

*P value for sex differences were calculated by Pearson χ² test.