Table 5. Prevalence of respiratory symptoms in the first survey in relation to study communities.

	N	History of allergic diseases	Bronchitis ever	Chronic cough	Chronic phlegm	Asthma	Wheeze
Males
Chiba	112	58.9	30.4	1.8	0.0	10.7	7.1
Funabashi	207	55.1	27.5	0.5	1.0	6.8	7.7
Kashiwa	165	60.6	24.8	1.8	1.8	7.3	5.5
Ichikawa	221	57.5	21.7	0.9	1.4	8.1	8.1
Ichihara	157	52.2	15.3	1.9	1.3	5.1	4.5
Tateyama	179	47.5	18.4	1.1	1.1	7.3	4.5
Mobara	93	52.7	19.4	2.2	1.1	5.4	4.3
Kisarazu	129	52.7	13.2	0.8	1.6	6.2	2.3
p-value		0.305	0.004	0.859	0.948	0.762	0.299
Females
Chiba	127	55.1	30.7	3.9	3.9	8.7	4.7
Funabashi	219	52.1	25.6	0.5	0.0	10.0	6.8
Kashiwa	176	54.0	26.7	1.1	2.3	7.4	5.1
Ichikawa	201	55.2	15.4	2.5	1.5	8.5	5.5
Ichihara	133	48.1	16.5	3.8	3.8	5.3	3.8
Tateyama	157	48.4	19.1	3.8	2.5	5.1	5.1
Mobara	85	50.6	20.0	0.0	0.0	4.7	4.7
Kisarazu	145	50.3	11.7	2.8	0.7	3.4	3.4
p-value		0.841	< 0.001	0.132	0.055	0.229	0.900