Table 2 Risk Factor Associations with ED Admissions for Ages 1–17 yrs and for Ages 5–12 yrs

Risk Factor Unit Increase	Risk Factor	Mean % Change in Daily Visits per Risk Factor Unit Increase	T-test p-value
0.01 ppm	Ozone	4.5 (0.6, 8.5)	0.023
1 μg m^-3	PM2.5	0.2 (-0.6, 1.1)	0.548
1000 spores m^-3	Mold Count	1.1 (-0.8, 3)	0.250
10 grains m^-3	Weed Pollen	7.7 (0.7, 15.2)	0.029
100 grains m^-3	Tree Pollen	1.5 (-0.3, 3.3)	0.105
10 grains m^-3	Grass Pollen	0.7 (-7.4, 9.5)	0.874
1°F	Temperature	0.5 (0.1, 0.8)	0.018
Risk Factor Unit Increase	Risk Factor	Mean % Change in Daily Visits per Risk Factor Unit Increase	T-test p-value
0.01 ppm	Ozone	8.3 (2.6, 14.4)	0.004
1 μg m^-3	PM2.5	-0.4 (-1.6, 0.8)	0.479
1000 spores m^-3	Mold Count	2 (-0.6, 4.6)	0.140
10 grains m^-3	Weed Pollen	10 (0.5, 20.5)	0.039
100 grains m^-3	Tree Pollen	1.8 (-0.8, 4.4)	0.173
10 grains m^-3	Grass Pollen	1.8 (-9.4, 14.5)	0.764
1°F	Temperature	0.9 (0.4, 1.5)	0.001

The numbers in parenthesis represent the lower and upper 95% confidence limits for the percent change in admissions. The upper table is for ages 1–17 yrs and the lower table is for ages 5–12 yrs.

ISSN: 1476-069X