Table 3.

Correlation coefficients among air pollutants

Variables	PM2.5	PM10	NO2	SO2	CO
PM2.5	1.00	0.87*	0.67*	0.61*	0.68*
PM10	―	1.00*	0.64*	0.63*	0.60*
NO2	―	―	1.00	0.54*	0.59*
SO2	―	―	―	1.00	0.55*
CO	―	―	―	―	1.00

*P < 0.001