Table 3.

Pearson correlation coefficients for the for the 24 h pollutant concentrations (μg/m³) and weather covariates.

Exposure	Ozone	PM2.5	PMcoarse	NOx	NO2	NO	Temp.
Ozone	1
PM2.5	0.415 *	1
PMcoarse	−0.139	0.008	1
NOx	−0.041	0.257	0.150	1
NO2	0.158	0.363 *	0.126	0.938 **	1
NO	−0.083	0.232	0.153	0.997 **	0.909 **	1
Temp.	0.423 **	0.414 *	−0.117	−0.228	−0.143	−0.242	1

* : p < 0.05; ** p < 0.01.