Coal Mine Air Pollution and Number of Children Hospitalizations because of Respiratory Tract Infection: A Time Series Analysis

Table 3

The relative risk of hospital admissions because of respiratory tract infection with every g/m³ rise in PM10 concentration.

	Lag days	RR (95% CI)
Upper respiratory; tract infections	0	0.997 (0.991–1.004)	−0.819	0.413
	1	0.997 (0.991–1.003)	−1.127	0.260
	2	1.000 (0.994–1.005)	−0.077	0.938
	3	0.993 (0.987–0.999)	−2.315	0.021
	4	0.996 (0.990–1.002)	−1.422	0.155
	5	0.997 (0.991–1.002)	−1.155	0.248
	6	0.999 (0.994–1.005)	−0.195	0.846
	7	1.000 (0.994–1.005)	−0.082	0.935
	8	1.003 (0.997–1.008)	0.925	0.355
	9	0.997 (0.991–1.003)	−0.905	0.366
	10	1.002 (0.996–1.007)	0.589	0.556
Lower respiratory tract infections	0	0.997 (0.992–1.002)	−1.104	0.270
	1	1.001 (0.997–1.006)	0.480	0.631
	2	1.002 (0.997–1.006)	0.760	0.448
	3	1.001 (0.996–1.005)	0.280	0.780
	4	1.001 (0.997–1.006)	0.651	0.515
	5	1.002 (0.997–1.006)	0.757	0.449
	6	0.999 (0.994–1.004)	−0.437	0.662
	7	1.003 (0.998–1.007)	1.158	0.247
	8	1.000 (0.995–1.005)	−0.011	0.991
	9	1.000 (0.995–1.004)	−0.092	0.927
	10	1.000 (0.995–1.005)	−0.007	0.995