Table 5.

Results of seasonal Poisson regressions of air pollutants and meteorological factors on emergency department visits

Variables	Spring			Summer			Autumn			Winter
	Coef	SE	p value	Coef	SE	p value	Coef	SE	p value	Coef	SE	p value
Fine particles	0.024	0.018	0.199	− 0.082	0.055	0.131	0.052	0.032	0.107	0.003	0.032	0.931
Intercept	− 29.035	37.402	0.438	− 22.254	77.335	0.774	9.183	34.969	0.793	45.921	42.385	0.279
Temperature	0.088	0.033	0.007	0.040	0.045	0.375	0.038	0.032	0.239	0.107	0.052	0.039
Relative humidity	0.016	0.016	0.311	− 0.021	0.043	0.621	0.016	0.019	0.419	0.036	0.029	0.214
Wind speed	0.898	0.567	0.113	− 0.608	0.453	0.180	0.537	0.403	0.183	0.411	0.500	0.411
Air pressure	0.026	0.036	0.477	0.027	0.079	0.736	− 0.010	0.034	0.763	− 0.048	0.041	0.245
Protein (fine particles)	− 0.128	0.121	0.291	− 1.039	0.521	0.046	0.098	0.129	0.449	0.048	0.233	0.837
Intercept	− 48.966	38.962	0.209	− 53.432	80.320	0.506	11.460	34.557	0.740	49.651	46.418	0.285
Temperature	0.119	0.039	0.002	0.011	0.047	0.822	0.038	0.034	0.252	0.107	0.051	0.035
Relative humidity	< 0.001	0.015	0.974	0.001	0.030	0.977	− 0.001	0.015	0.966	0.035	0.028	0.221
Wind speed	0.632	0.544	0.246	− 0.505	0.394	0.200	0.262	0.359	0.465	0.367	0.502	0.465
Air pressure	0.047	0.038	0.210	0.057	0.082	0.488	− 0.010	0.034	0.756	− 0.051	0.045	0.254
Endotoxin (fine particles)	22.987	43.993	0.601	28.411	181.928	0.876	23.465	34.868	0.501	97.331	399.535	0.808
Intercept	− 38.240	37.175	0.304	33.846	70.257	0.630	6.580	34.906	0.850	49.851	45.574	0.274
Temperature	0.096	0.032	0.003	0.049	0.049	0.309	0.028	0.032	0.390	0.103	0.051	0.042
Relative humidity	0.010	0.015	0.517	0.035	0.028	0.210	0.004	0.020	0.835	0.044	0.046	0.336
Wind speed	0.732	0.552	0.185	− 0.163	0.412	0.692	0.333	0.382	0.382	0.361	0.501	0.471
Air pressure	0.036	0.036	0.317	− 0.035	0.071	0.618	− 0.006	0.034	0.864	− 0.052	0.045	0.248
Coarse particles	0.065	0.026	0.013	0.048	0.071	0.496	0.087	0.036	0.017	0.037	0.020	0.058
Intercept	− 40.870	37.408	0.275	42.374	70.477	0.548	− 2.956	35.372	0.933	34.113	42.135	0.418
Temperature	0.103	0.034	0.003	0.035	0.051	0.500	0.042	0.033	0.212	0.096	0.052	0.066
Relative humidity	0.014	0.015	0.349	0.033	0.028	0.227	0.007	0.015	0.647	0.042	0.029	0.146
Wind speed	0.909	0.555	0.101	− 0.155	0.330	0.640	0.185	0.358	0.606	0.631	0.496	0.203
Air pressure	0.037	0.036	0.299	− 0.044	0.071	0.537	0.003	0.034	0.933	− 0.037	0.041	0.361
Protein (coarse particles)	− 4.194	2.563	0.102	− 0.635	2.404	0.792	− 1.318	0.909	0.147	5.056	2.264	0.026
Intercept	− 6.415	42.314	0.879	29.896	71.928	0.678	13.038	33.558	0.698	41.434	41.091	0.313
Temperature	0.106	0.033	0.001	0.052	0.049	0.295	0.044	0.033	0.185	0.114	0.052	0.028
Relative humidity	0.002	0.014	0.867	0.038	0.030	0.216	< 0.001	0.015	0.983	0.036	0.028	0.205
Wind speed	0.609	0.551	0.269	− 0.165	0.359	0.646	0.256	0.355	0.471	0.361	0.467	0.440
Air pressure	0.006	0.041	0.892	− 0.031	0.072	0.663	− 0.012	0.033	0.716	− 0.044	0.040	0.272
Endotoxin (coarse particles)	9.069	32.095	0.778	45.832	26.900	0.088	10.432	15.789	0.509	311.199	208.761	0.136
Intercept	− 34.800	38.148	0.362	18.278	70.654	0.796	9.706	34.671	0.780	56.880	44.515	0.201
Temperature	0.094	0.035	0.007	0.019	0.049	0.706	0.018	0.037	0.619	0.059	0.058	0.314
Relative humidity	0.006	0.014	0.677	0.022	0.028	0.434	− 0.005	0.015	0.731	0.046	0.029	0.112
Wind speed	0.657	0.545	0.228	− 0.315	0.362	0.384	0.243	0.359	0.498	0.254	0.485	0.600
Air pressure	0.033	0.037	0.370	− 0.018	0.071	0.799	− 0.008	0.034	0.813	− 0.059	0.043	0.171

Coef regression coefficient, SE standard error of the regression

Statistically significant, p < 0.05