Association between Particulate Matter Pollution Concentration and Hospital Admissions for Hypertension in Ganzhou, China

Table 4

Changes in PM_2.5 concentration on lag day 60 and changes in 95% CIs excess risk (ER) of hypertension hospital admissions with different df values of time, temperature, and relative humidity.

Variable	df	AIC	ER	95% CI
Time	6	5,509.46	7.51	5.11–9.97
	7	5,501.516	7.90	5.50–10.36
	8	5,485.721	7.81	5.41–10.26
	5	5,499.726	7.89	5.49–10.35
Temperature	6	5,501.516	7.90	5.50–10.36
	7	5,501.936	7.82	5.42–10.28
	2	5,499.51	7.92	5.52–10.37
Relative humidity	3	5,501.516	7.90	5.50–10.36
	4	5,503.707	7.89	5.49–10.35