Table 5.

Relative risks of asthma hospitalization associated with air pollutants in different regions—a single pollutant model.

	Single Pollutant Model
	Northern			Chu-Miao
Pollutants	RR	95%CI	p-Value	RR	95%CI	p-Value
PM2.5	1.075 ***	1.057–1.093	0.000	1.022	0.954–1.093	0.539
PM10	1.038 ***	1.021–1.054	0.000	1.020	0.953–1.090	0.560
O3	0.989	0.970–1.008	0.237	0.981	0.911–1.055	0.598
SO2	1.109 ***	1.093–1.126	0.000	1.049	0.979–1.124	0.175
NO2	0.995	0.977–1.014	0.610	1.022	0.964–1.082	0.459
	Central Taiwan			Yun-Chia-Nan
Pollutants	RR	95%CI	p-Value	RR	95%CI	p-Value
PM2.5	1.026 *	1.001–1.052	0.043	1.049 *	1.005–1.094	0.027
PM10	1.085 ***	1.058–1.113	0.000	1.054 *	1.008–1.099	0.018
O3	0.952 ***	0.926–0.979	0.000	0.992	0.951–1.0034	0.689
SO2	1.216 ***	1.182–1.251	0.000	1.152 ***	1.094–1.213	0.000
NO2	1.011	0.985–1.037	0.424	1.069 ***	1.030–1.110	0.000
	Kao-Ping			Yilan
Pollutants	RR	95%CI	p-Value	RR	95%CI	p-Value
PM2.5	1.083 ***	1.045–1.123	0.000	0.995	0.924–1.070	0.899
PM10	1.096 ***	1.053–1.141	0.000	0.980	0.918–1.039	0.529
O3	1.033	0.995–1.073	0.091	0.956	0.884–1.033	0.255
SO2	1.185 ***	1.129–1.244	0.000	1.070	0.987–1.160	0.101
NO2	1.079 ***	1.044–1115	0.000	1.025	0.964–1.088	0.416
	Hua-Tung			Outlying Islands
Pollutants	RR	95%CI	p-Value	RR	95%CI	p-Value
PM2.5	0.986	0.901–1.077	0.764	1.026	0.849–1.23	0.784
PM10	1.023	0.936–1.115	0.603	1.030	0.834–1.257	0.780
O3	1.019	0.928–1.118	0.686	1.079	0.868–1.340	0.492
SO2	0.977	0.882–1.080	0.652	1.023	0.857–1.210	0.794
NO2	1.005	0.931–1.082	0.900	1.049	0.825–1.320	0.690

* p-value < 0.05, ** p-value < 0.01, *** p-value < 0.001.