Air pollution and mortality in a large, representative U.S. cohort: multiple-pollutant analyses, and spatial and temporal decompositions

Table 2 Correlations (Pearson’s r) and summary statistics of criteria pollutants (1999–2015) in the NHIS cohort

	PM_2.5	PM_2.5–10	SO₂	NO₂	O₃	Mean	SD	IQR
PM_2.5 (10 μg/m³)						10.67	2.37	3.12
PM_2.5–10 (10 μg/m³)	0.19					9.77	4.51	5.42
SO₂ (ppb)	0.41	−0.34				2.25	1.01	1.26
NO₂ (ppb)	0.56	0.44	0.37			10.69	5.73	6.72
O₃ (ppb)	0.33	0.17	0.17	0.11		47.45	5.31	6.75
CO (ppm)	0.42	0.56	0.17	0.90	0.04	0.37	0.10	0.10

Note: PM_2.5, fine particulate matter (particles < 2.5 μm in aerodynamic diameter); PM_2.5–10, coarse fraction particulate matter (particles 2.5–10 μm in aerodynamic diameter); SO₂, sulfur dioxide; NO₂, nitrogen dioxide; O₃, ozone, mean for May–September of daily max of eight-hour moving average; CO, carbon monoxide; SD, standard deviation; IQR, interquartile range

ISSN: 1476-069X