Acute effect of fine particulate matter and respiratory mortality in Changsha, China: a time-series analysis

BMC Pulmonary Medicine

Table 2 Spearman correlations between air pollutants and meteorological factors in Changsha, 2015–2018

Variables	PM_2.5	PM₁₀	SO₂	NO₂	O₃	Temperature	Relative humidity
PM_2.5	1.000	0.871^**	0.508^**	0.692^**	-0.085^**	-0.429^**	-0.223^**
PM₁₀		1.000	0.691^**	0.696^**	0.137^**	-0.183^**	-0.510^**
SO₂			1.000	0.569^**	0.108^**	-0.012	-0.604^**
NO₂				1.000	-0.131^**	-0.447^**	-0.307^**
O₃					1.000	0.631^**	-0.535^**
Temperature						1.000	-0.253^**
Relative humidity							1.000

ISSN: 1471-2466