Table 4.

Correlation coefficient of different lags for PM_2.5 (μg/m³).

Items	lag1	lag2	lag3	lag4	lag5
lag0	0.825	0.692	0.631	0.582	0.531
lag1		0.825	0.692	0.631	0.583
lag2			0.824	0.691	0.631
lag3				0.825	0.691
lag4					0.824

PM_2.5 concentration with different lags from 0 to 5 days prior to mortality (lag0–lag5).