Fine particulate air pollution and its components in association with cause-specific emergency admissions

Table 4 Modification of the PM_2.5 mass association across 26 US by PM_2.5 composition.

		P-value for modifier	%	95% CI		IQR
Cardiovascular disease
Traffic
	Br	0.01	0.81	0.23	1.40	0.00010
Sea salt, street salt
	Na⁺	< 0.01	0.87	0.35	1.39	0.00945
Industrial combustion sources
	Ni	< 0.01	0.90	0.46	1.35	0.00012
	V	0.05	0.73	0.01	1.44	0.00017
Soil and road dust
	Al	0.05	0.53	0.00	1.07	0.00193
Myocardial Infarction
Traffic
	OC	0.03	1.03	0.13	1.94	0.07060
Industrial combustion sources
	Ni	0.04	1.13	0.04	2.22	0.00012
	As	< 0.01	2.35	0.84	3.85	0.00006
	Cr	0.05	1.34	0.00	2.68	0.00010
Sea salt, street salt
	Na⁺	0.03	1.42	0.16	2.68	0.00945
Soil and industrial sources
	Mn	0.03	0.99	0.14	1.85	0.00018
Wood burning and soil
	K	0.05	1.61	0.01	3.22	0.00270
Diabetes
Traffic
	OC	< 0.01	-2.42	-3.79	-1.06	0.07060
	EC	0.02	-2.12	-3.84	-0.39	0.02469
Industrial combustion sources
	As	0.04	2.16	0.11	4.21	0.00006
	SO₄ ^2-	0.01	2.91	0.92	4.89	0.11610
Congestive heart failure
Soil and road dust
	Al	0.07	0.77	-0.07	1.61	0.00193
Industrial combustion sources
	Ni	0.07	0.64	-0.04	1.32	0.00012
Respiratory disease
Sea salt, street salt
	Na⁺	0.06	0.94	-0.02	1.91	0.00945
Industrial combustion sources
	Ni	0.06	0.75	-0.03	1.53	0.00012

Results are expressed as % increase in cause-specific hospital admission per 10 μg/m³ increase in PM_2.5 for an IQR increase in the Species to PM_2.5 mass proportions

ISSN: 1476-069X