Table 1.

Prevalence of wheeze, breathlessness, rhinitis and rhinoconjunctivitis among students (N = 1332) in urban and rural high schools in Shanxi, China. p values were calculated by Chi-square test. Significant p values (p < 0.05) were formatted with bold font

Symptoms	Number	Prevalence (%)	Male (%)	Female (%)	p value	Urban (%)	Rural (%)	p value
Doctor’s diagnosed asthma	12	0.9	1.1	0.5	0.22	1.2	0.2	0.09
Wheeze	83	6.3	7.5	4.6	0.03	7.1	4.1	0.04
Shortness of breath	432	32.4	28.0	37.7	< 0.001	33.5	30.4	0.26
Rhinitis	518	38.9	39.5	38.2	0.63	41.9	32.4	0.001
Rhinoconjunctivitis	199	15.1	15.3	14.8	0.82	15.9	13.3	0.22