Meteorological factors, ambient air pollution, and daily hospital admissions for depressive disorder in Harbin: A time-series study

Table 2 Spearman correlation coefficients between environmental factors

	AP	WS	RH	PM2.5	PM10	SO2	CO	NO2	O3_8h
AT	-0.75c	0.07c	0.18c	-0.61c	-0.46c	-0.78c	-0.49c	-0.42c	0.60c
AP		-0.27c	-0.17c	0.50c	0.40c	0.62c	0.41c	0.44c	-0.48c
WS			-0.35c	-0.16c	-0.13c	-0.11c	-0.26c	-0.41c	0.17c
RH				-0.17c	-0.25c	-0.19c	-0.02	-0.06c	-0.21c
PM2.5					0.92c	0.77c	0.78c	0.76c	-0.19c
PM10						0.69c	0.71c	0.75c	-0.09c
SO2							0.67c	0.64c	-0.35c
CO								0.76c	-0.21c
NO2									-0.24c

^cP < 0.001.

AT: Air temperature; AP: Atmospheric pressure; WS: Wind speed; RH: Relative humidity; PM_2.5: Fine particles; PM₁₀: Inhalable particles; SO₂: Sulfur dioxide; CO: Carbon monoxide; NO₂: Nitrogen dioxide; O₃_8h: Maximum 8-h average concentration of ozone.